Gold Dot Carbine | Speer

“With a surge in popularity of pistol-caliber carbines, and an end user desire to use them for personal protection, we’ve designed and optimized Gold Dot,” said Speer’s Handgun Product Manager Chris Laack. “The Gold Dot’s construction and Uni-core bonding creates a very robust bullet that performs well at the higher velocities that come from carbine-length rifle barrels.”

Gold Dot Carbine produces ideal velocities through carbine-length barrels and cycles flawlessly. The Speer Gold Dot G2-style, elastomer filled bullet nose is tuned to produce extremely effective penetration and expansion through common barriers.

“Gold Dot G2-style bullet has been updated for optimized terminal performance, accuracy, and function in carbine platforms,” continued Laack. “We’ve also made sure it’s still a capable load in full-size handguns, to allow for flexibility in use.”

This new product is available in 50-count boxes; MSRP: $76.99.

Speer Ammunition can be found at dealers nationwide. For more information on all products or to shop online, visit www.speer.com.

By Al Paulson

As unconventional warfare heated up in South Vietnam, former OSS officer and prolific silencer designer Mitchell Livingston WerBell III realized early that a silent carbine of pistol caliber would provide substantial tactical dividends for special and black operations being conducted throughout Indochina. Ideally, the weapon should be similar in size and performance to the impressive .45 ACP Silent Carbine developed by William Godfray De Lisle for Sir Malcolm Campbell of British Combined Operations during World War II. The De Lisle Silent Carbine was used with extraordinary success by British commandos on raids against Fortress Europe prior to D-Day, and against the Japanese in the Indo-Pacific Theater. After VJ Day, the De Lisle carbine proved to be a most useful weapon during the Malaysian Communist Emergency, when it was employed by the British Army and Special Branch Police against Communist insurgents and terrorists in a classic counter-guerrilla warfare campaign. The De Lisle was quiet and powerful, but the baffle stack was fragile and subject to damage in the field, which ruined accuracy. WerBell sought to make a more robust and modern version of the De Lisle that would have all of its virtues and none of its shortcomings. The net result was a series of weapons produced by the Military Armament Corporations that were collectively called the Destroyer Carbine.

The original incarnations of the MAC Destroyer Carbine were based upon the Spanish Model 1921 Destroyer Magazine Rifle. The earliest variants of the Destroyer Rifle were made by Gaztanaga y Compania of Eiber, Spain. Subsequent variants marketed as the Destroyer Magazine Rifle were apparently made in the 1920s and 1930s by Ayra Durex. The Magazine Rifles came in several calibers including 9mm Bergmann-Bayard (also known as the 9mm Largo and 9x23mm), 9mm Parabellum (9x19mm) and .380 ACP (9x17mm). Clearly inspired by the Model 93 Mauser rifle, the Destroyer has a personality all its own. Like the Mauser, the Destroyer cocks upon closing the bolt. The Destroyer also features a Mauser-type wing safety on the bolt sleeve and a Mauser-like claw extractor. Unlike the Mauser, however, the extractor is located on top of the bolt rather than on the right side. Furthermore, the bolt’s two locking lugs are located just in front of the bolt handle, perhaps half of the way back from the bolt face. This arrangement is reminiscent of a Ruger 77/22 rather than a Mauser M93 and facilitates the stripping of rounds from a pistol magazine.

For several reasons, WerBell decided to chamber his modern incarnation of the De Lisle Silent Carbine for the 9x19mm cartridge rather than the De Lisle’s more potent .45 ACP, despite the fact that M1911 magazines fit neatly in the magazine well of 9x23mm Destroyers. Doing so saved expensive re-manufacturing and heat-treating of the bolt. Furthermore, the steel used in the Model 1921 rifles was very soft and of variable quality, so there was some question whether the actions could stand up to the larger cartridge when used for military-rather than sporting—applications.

WerBell developed a number of variations on the 9mm Destroyer theme. Some contained replaceable wipe modules, while others were based on WerBell’s typical frusto-conical baffles.

WerBell developed at least five documented variants of the Destroyer Carbine. One variant used a shortened barrel with an early suppressor designed for the Ingram M10 9mm submachine gun. This early suppressor featured a single tube measuring approximately 1.75 inches in diameter and 10 inches in length.

Another variant used the standard MAC .30 caliber suppressor designed for the M14 rifle. The bore of the M14SS-1 silencer was sufficiently large to safely accommodate the relatively short 9mm pistol projectile. This variant was particularly accurate when fitted with a Tasco 4-power scope, but it was not particularly quiet—even with subsonic ammunition, delivering a sound signature of 136 decibels when I test-fired this Destroyer with Black Hills 147 grain RN FMJ subsonic ammunition. (That’s comparable to the sound signature of HK’s UMP-45 submachine gun with B&T’s SD UMP silencer.) A photo of this variant of the MAC Destroyer with M14SS-1 silencer accompanies this discussion.

A third variant employed a two-stage suppressor that featured a replaceable wipe module called an “auxiliary front chamber” at the front end of the can. The entire two-stage suppressor measured approximately 1.5 inches in diameter for its entire length, which was about 11.75 inches. The rear end of the can extended back to the Destroyer’s receiver.

A fourth variant was identical to the third, except the wooden butt stock was removed and the weapon was retrofitted with a collapsible wire stock and pistol grip, along with a side-mounted Mossberg 4-power .22 rimfire scope. This version was demonstrated at the ARVN Infantry School in South Vietnam in the late 1960s. The Army ordered a small quantity (4 to 10) of improvised silenced carbines for field evaluation in Vietnam in 1969. It is not clear which of the preceding variants was used to fill that requirement.

The final variant featured a simple suppressor measuring about 1.5 by 11 inches that came back to within 1/4 inch of the receiver. It was this variant that was delivered to the Army in some quantity, when an order for carbines was placed with the Military Armament Corporation.

The second Army order arrived just as the availability of the Spanish rifle dried up in the States. Therefore, most of the Destroyers delivered to the Army were built upon the Remington 788 rifle, which was converted to 9mm and modified to accept modified Walther P-38 pistol magazines and a Tasco 4-power scope mounted directly on the receiver. I have not yet learned how many Destroyers were actually delivered to the Army.

As readers of SAR may know, I recently completed a military tour in Bosnia and was able to observe and handle many foreign weapons. One which caught my eye was that carried by the Belgium contingent – the Fabrique Nationale Carabine. Upon returning to America I kept on thinking about that FNC. I discovered they were available and decided (actually, my wife Linda gave me permission) to get one. A phone call to Gene Guilaroff, who has supplied me “black rifles” in the past, had an FNC Paratrooper with 18” barrel on the way to me.

After becoming quite familiar with my FNC, I wanted to learn more about it but quickly discovered there was little information available. Well, that situation has now ended with the publication of this two-part series on the FNC. This first article will provide a detailed overview of the rifle, including its background, technical details and operating characteristics. The second article, to be published shortly, will cover in detail its conversion to a factory-correct select fire weapon. Hint for all Class III enthusiasts: registered sears are plentiful and relatively inexpensive!

Installment 1 of the FN FNC in America.

Background

The birth of the FNC begins with its grandfather, the world famous FN FAL 7.62mm battle rifle. In the period 1963-66 as the arms market showed interest in smaller calibers, particularly the 5.56mm round, FN responded by designing the 5.56mm CAL rifle. Essentially the CAL was a smaller version of the FAL and continued to use the unique adjustable gas system. Unfortunately, the CAL was costly to manufacture/unreliable and therefore discontinued in 1975. It should be noted that 15-20 semiauto CAL’s were imported into America and sell (if available) for around $7500.

During 1974-76 FN redesigned the CAL into what we now know as the FNC. This was done for two reasons: 1) to compete in the 1976 Swedish arms tests and 1977-80 NATO cartridge evaluation trials; and, 2) to market a reliable 5.56mm rifle which could oppose the M16. Ultimately, in addition to Belgium, Sweden and Indonesia became licensed manufacturers of the FNC. At last count the FNC remains used by these three countries’ military forces and also is exported to parts of Asia and Africa.

Three importers are known to have brought semiauto FNC’s into the United States. Steyr of Secaucus, NJ and Howco of Laurel, MD brought in a total of about 1000 into the US during 1982-early ’83 timeframe. Gun South Inc. of Birmingham (later Trussville), AL imported approximately 5000 from mid 1983-88. When first imported in 1982 the price for an FNC was between $1000-1100. In 1985 this dropped to around $750 for either version to stimulate sales. In 1989 the importation of FNC’s, along with SIG, etc. was halted upon order of President Bush.

There were three imported versions of the FNC:

*Standard Model – Fixed stock with 18” barrel

*Paratroop Version 1 – Folding stock with 18” barrel

*Paratroop Version 2 – Folding stock with 16” barrel

Interestingly enough, while the folding/collapsing stock versions of military style weapons tend to be more rare, this is not the case with the FNC. Almost 90% of all imported FNC’s were the folding stock variation while the fixed stock comprised just 10% of the total. Also, the short 16” barrel is relatively uncommon and quite desirable.

Technical Details

Layout

The FNC is constructed of steel and aluminum alloys that are designed for reliability of operation and straightforward construction. Most of the parts are finished with a rugged satin black enamel which is baked on. The aluminum parts are black anodized while several steel items are dark gray parkerized.

With an overall length of 39.25” and unloaded weight of 8.3 lbs. (Para Version 1) it is of similar dimensions when compared to other 5.56mm rifles. The relationship of stock, trigger and handguard is excellent and readily lends itself to ease of handling and shooting. The handfilling front handguard is particularly well designed and remains cool to the touch even after periods of extended firing.

The trigger is designed by FN as a single-stage model and is fairly stiff. Trigger slack takeup requires 2.5 lbs. of pressure while sear disengagement needs an additional 8 lbs. to achieve release. Creep is typically .04-.05” which is well within specifications for a rifle designed for hard battlefield use.

The FNC is designed to use the NATO STANAG 4179 (Colt AR15-type) magazine. While a blued all-steel 30-round mag was originally available, it is generally hard to find and expensive. This is not a problem as the Colt 20 and 30-round versions work perfectly well and are found everywhere. For you serious collectors, the Beta-C mag should work properly in the FNC.

Receiver

The upper receiver is composed of stamped sheet steel with all welding performed robotically. The barrel extension, which includes the cartridge feed ramp, is spot welded into the front of the receiver. The rear of the receiver is given structural integrity by having the rear take down support also spot welded in. The rear sight assembly, too, is welded onto the receiver. To carry the bolt assembly, two U-shaped guide rails are spot welded inside the receiver. Next to the right guide rail is the ejector, which is riveted in place. Finally, to keep debris from getting inside the receiver there is a cocking slot cover which is spring loaded to ride over the cocking handle when the bolt assembly reciprocates.

The lower receiver is milled from aluminum alloy stock which is black anodized to reduce visibility. The magazine release is very similar to the Colt AR15 and is well positioned for one finger use. The trigger mechanism replicates the FALs’ and is easily accessible for maintenance. By rotating the safety switch vertically upwards it can be slid out to permit greater internal access for mechanism adjusting and/or replacement.

Barrel

The FNC’s imported into the US had two different length barrels. One was 18” and the other was 16”. Paratroop FNC’s came with both lengths while the standard fixed stock model came with the 18” version. Unlike the AR15, there has never been a heavyweight or “target” FNC barrel.

The barrel is hammer forged with a 6-groove RH twist which, is then hard chrome plated. Twist is 1/12” and designed to stabilize the US M193 55gr. bullet. It may not fully stabilize the newer US M855 62gr green tip slug. Interestingly enough, the Swedish Bofors-manufactured FNC (entered service in 1987 as the AK5) initially used a slow twist barrel due to humanitarian concerns about excessive wound trauma. They have since adopted the 1/7” twist as used on the M16A2 rifle.

The FNC barrel has a parkerized NATO-standard 22mm flash suppressor (LH thread!) which is very similar to the FAL “shorty” factory model. Flash suppression is adequate, but the main purpose of this device is to allow the mounting/launching of rifle grenades. Finally, the barrel is ribbed to support a clip-on bipod and front sling swivel.

Operating System

The gas-operated recoil system is a combination of the AK and FAL systems. A takeoff port in the barrel directs expanding gases through the gas block and into the gas tube. This tube carries the gas piston, which is part of the bolt carrier assembly. The gas slams into the head of the gas piston and forces the entire bolt carrier assembly to move backwards. As it begins moving to the rear, a camming action causes the bolt to unlock from the barrel extension and extract the spent cartridge case. Further bolt assembly movement causes the case to hit the ejector, recock the hammer and compress the recoil spring. The spring then drives back into battery the bolt carrier assembly, which strips off a fresh cartridge from the magazine and cams the bolt back into engagement with the barrel extension locking lugs. It is now ready for another round to be fired.

The FNC bolt is similar in size to an AR15 bolt and has two large dual-opposed locking lugs. The firing pin rides within the bolt, but is unusual in that it is retained by the bolt carrier and floats for 7mm. A firing pin spring is used so that an accidental inertia impact with the cartridge primer (which AR15’s are known to do) is eliminated. This firing pin is very thin and perhaps the weakest point in the FNC system.

Finally, the FNC gas system is adjustable in two separate ways. Should crud build up and more gas pressure is needed to cycle the action, an extension on the gas piston tube is rotated 90 degrees clockwise. This will cause the gas piston tube to close over an exhaust port located on the gas block and result in increased pressure being diverted against the gas piston head. The second adjustment is in regard to the firing of rifle grenades. By flipping up the grenade sight the gas is then cut off from flowing through the gas block and the FNC will not cycle. This permits the full force of the gas to be directed against the base of the grenade. Of course, a special ballistite (blank) cartridge is required to generate the high pressures required for launching.

Sights

Sights on the FNC are clearly in line with those of the FAL. The rear is an aperture type that flips into two positions: one for 250m and the other for 400m. It is protected from accidental knocks by two ears, which extend up from the base. Each adjusting click of the detent will traverse the bullet point-of-impact 1cm at 100m. The front sight is a spring-loaded post, which is also protected by two ears. Although there is no detent, each 1/4 turn of the post will elevate the bullet 1cm at 100m. While the sight adjusting function is performed with the combination tool, the Uzi SMG tool is also perfect for the job. Sight radius for the FNC is 20”.

Furniture

All the furniture on the FNC is rugged black plastic. The handguards are compression molded and riveted with brass nibs to steel liners. These liners give excellent structural integrity while being vented to dissipate the heat both forward and through the top. The pistolgrip is a direct takeoff from the FAL and is wedge shaped with a fairly steep rake to increase control while in rapid fire. The pistolgrip also contains the oiler/cleaning kit.

The sturdy folding stock is also a copy of the FAL paratroop unit. The two legs and buttpiece comprising the stock are made of aluminum, which has been finished in a baked-on satin black enamel. Also, the top leg of the buttstock is encased in plastic to reduce the effect of temperature extremes on the shooter’s face. The stock is fixed to the lower receiver via an aluminum mounting block which has been black anodized. To fold the stock, simply thumb aside the lock button, disengage the stock from the mounting block and fold against the right side of the rifle.

The fixed stock is also made of hard black plastic with a steel buttplate. It is mounted directly to the lower receiver via one screw. Swapping folding and fixed buttstocks is quite simple and requires no modifications to the bolt carrier, recoil mechanism, etc. Simply remove the screw, replace the stock, and reinstall the screw.

Spare Parts

Just recently the import of Indonesian-manufactured spare parts has taken place. Spare barrels, firing pins, magazines, tools, etc. are all available from Tampa Bay Military & Police Supply Inc. These items are officially licensed from FN and built to military specifications by the quasi-governmental firm of Bandung. Since Indonesia has been fighting terrorists and internal unrest for many years it is safe to say these parts have stood the test of time and will work quite well in the FNC. Two particularly interesting items are the 16” and 18” barrel assemblies with the 1/7” twist which will permit stabilization of the heavier M855 62gr. bullet.

Accessories

The FNC factory manual dated March, 1982, shows the following accessories to be available:

M16 Bayonet Adapter – This is attached to the barrel and permits the US M7 bayonet to be used. Otherwise, the FN “tubular” bayonet is used by sliding it over the NATO-standard 22mm flash suppressor.

Telescopic Sight – This is a superb 4×28 milspec scope manufactured by Hensoldt. It has the typical picket-post crosshair and sports an olive green finish. It is attached to the scope mount via two STANAG screws and is adjustable for windage and elevation.

Telescopic Sight Mount – This is a quick disconnect mount very similar to the SIG AMT design. The forward end of the mount is inserted into a cutout that is machined into a protrusion coming up from the barrel extension. The rear is then lowered until it lays against a dovetail which is part of the rear sight base. A lever on the mount is then pushed which cams into the dovetail. Neat, simple and very quick.

Bipod – This is a sturdy cast aluminum “claw clamp” design similar to the model used on the AR15. It functions by squeezing the spring-loaded legs together and placing the open mouth against the barrel. Releasing it will cause the mouth to close around the barrel and remain in place. With a working height of 11” it gives excellent support to the FNC.

Combination Tool – This tool is very handy for cleaning the gas piston, gas block port and adjusting the sights. Normally quite difficult to find, it is now being imported by Tampa Bay Military & Police Supply Inc. and an excellent addition to the tool box.

Operating Characteristics

The FNC is a fun firearm to shoot. Its simple, yet solid, construction gives it a balance and heft which yields confidence. Whether in the paratroop or fixed stock versions, it remains an excellent firearm to employ.

To load the FNC simply insert the magazine into the feed well and push until it locks into place. Grasping the cocking handle on the right side of the receiver, pull it to the rear and release smartly. A round will be chambered. Take it off safe, aim through the sights and press the trigger. Recoil is well dampened and presses directly back into the shoulder. Recovery onto the target is rapid for followup shots.

Accuracy testing with 210 rounds of first quality (not surplus) IMI M193 ball ammo provided by Cole Distributing revealed my particular FNC fired a consistent 10-round group of 2 1/2 MOA. This was with iron sights and stiff trigger, while the average velocity clocked at 3281 fps. The accuracy with this particular FNC/cartridge combination was outstanding and exceeds any military requirement I am aware of. One comment: many shooters avoid “surplus fodder” due to concerns about overpressure, corrosion, etc. This is clearly not true with Cole’s .223 IMI cartridge. It is very accurate/clean burning and is highly recommended!

For reloading purposes the FNC is not as friendly as the AR15. Most cases being ejected from the FNC are dented due to impacting the cocking slot cover. Unlike the H&K series of rifles, there is no optional ejection port buffer to snap on and reduce case damage.

Breaking down and cleaning the FNC is similar to the AR15. First, take out the magazine and make sure the chamber is empty. Cock the weapon and place it on safe. Push out the two captive takedown pins that connect the upper and lower receivers together. Grasp the cocking handle and retract the entire bolt carrier assembly towards the rear. As the handle reaches the cutout at the rear of the cocking slot pull it (the handle) out from the bolt carrier assembly. Use your finger to slide out the bolt carrier assembly from the upper receiver rails.

Next, press on the recoil spring retainer plate and rotate it 1/4 turn in either direction. This will disconnect the recoil spring/guide from its attachment point inside the gas piston. Slowly withdraw it towards the rear as spring tension is released. Finally, separate the bolt from the bolt carrier by rotating it 1/4 turn counterclockwise and remove it from the bolt carrier. Be careful the firing pin spring does not accidentally fall off the pin and get lost! Remove the handguards by snapping off their spring retainer clip located in front of the gas block.

Cleaning the FNC is very simple. Standard solvents and oils are used, but make sure all ammonia-based products do not come into contact with the aluminum lower receiver. It will attack non-ferrous metal! Cleaning the barrel from the breech end is simple and the only proper way to do so. Make especially sure you address the receiver extension where the bolt locks up as it will harbor a good amount of crud. Other places to make sure are clean include the hard chromed gas piston area, the gas tube it travels in and the gas block with its porting hole. For really stubborn carbon deposits in these areas I use a wooden popsicle stick or the combination tool to scrap them away.

Reassembly is the reverse of disassembly. Items to watch for include making sure the cocking handle is placed back into the bolt carrier assembly (it’s easy to forget) and the gas selector lever is placed into the “normal” and not full power position.

Conclusion

The FN FNC is one of the “best kept secrets” in military-style rifles to be imported into America. It is clearly one of the best. When comparing its cost to similar imports the true value of the FNC will become even more apparent. In fact, I consider it one of the few remaining “bargains” to be found. Where else can you get a firearm of this type from an internationally respected manufacturer for the price of a green label AR15?

Firing the low recoil and commonly available 5.56mm cartridge makes it a pleasure to shoot and even easier on the pocketbook. Further, its supply of high capacity magazines is assured for years to come. As an additional incentive, the import of licensed spare parts has begun and will keep the FNC running long into the future.

Fabrique Nationale’s FNC until now has been little known in America and deserves much greater respect than has been accorded. Belgium, Indonesia, Sweden and a host of other armed forces cannot be wrong. Now, with your knowledge of the FNC, you will not be either.

Stay tuned for a future article on how to convert the FNC to select fire – with registered transferable factory parts!

Arclight
Attn: Gene Guilaroff
PO Box 173
Alvaton, KY 42122
(502) 622-7309

Tampa Bay Military &
Police Supply, Inc.
Attn: Dana Reed
501 S. Falkenburg Rd.
Tampa, FL 33619
(813) 662-9433
fullauto@gte.net

Cole Distributing, Inc.
Attn: Gary Cole
PO Box 50271
Bowling Green, KY 42102-2871
(502) 843-6844
www.cole-distributing.com

The author was recently invited to evaluate a unique tactical carbine system under consideration for law enforcement deployment. The “system” consisted of a standard M4 version of the M-16 carbine equipped with iron sights, along with an additional scoped, suppressed flattop for mid-range precision work. We tested the gun over a period of several weeks with help from tactical team members at our local Sheriff’s Office…

The reality of some of the major criminal events in the last couple of years has changed the way law enforcement looks at the rifle – again. The infamous North Hollywood bank robbery and shootout could have ended much quicker if a rifle or carbine had been utilized to end the fray with a single body or head shot. The brave men and women who responded to this monumental event displayed a remarkable devotion to duty. I remember the scenes from the newscast showing officers running into a gun shop to obtain rifles and ammunition. They obviously knew they needed a better tool for their predicament. One item learned from this event was that patrol officers should have small caliber rifle capability. With the proper training and equipment, agencies should be allowed to respond to such emergencies with the proper tools. If an officer is asked by duty to engage criminal elements willing to fight to the death, the use of deadly force to stop the fight is certainly justified.

Previously outfitted with handguns and sometimes shotguns, the trend is well underway to outfit many law enforcement (LE) units with some type of shoulder fired rifle or carbine. Several types of long arms are being deployed. Due to the advantages of having ammunition commonality, many LE units are using carbines chambered in 9mm, 40 S&W, and 45ACP. This combination increases the effective range of common pistol caliber ammunition out to 100 yards. Although the pistol calibers are better suited for the urban environment, some reports of finicky functioning and inaccuracy have questioned the reliability of such carbines. The “tactical” carbine, usually an AR-15 or M-16 seems to be dominating this arena.

There is no argument that the overwhelming majority of SWAT teams have adopted the .308 as their precision rifle caliber. When deployed in the counter-sniper role, the .308 wins over the .223 hands down. Among its many advantages, a 168-grain .308 can punch through heavy glass with a much better probability of success than any .223 loading. Selected marksmen which are deployed with .308 bolt guns might not always be available for backing up the patrol officer, and as was demonstrated in the Hollywood shootout, there are situations where the carbine would obviously help fill the gap. Not meant to take away from the traditional sniper role, the use of the carbine can help fill the niche between the engagement ranges of the pistol, shotgun, and precision rifle. Last time I checked, the national average for LE sniper shots was around 75 yards.

The tactical carbine can be defined as a short-range weapon that exhibits both short and long-range accuracy potential. Its 5.56x45mm cartridge delivers excellent hit probability from muzzle to around 300 yards. With the selection of the correct ammunition, over-penetration issues that have arisen in past thinking are subsiding. Modern .223 hollowpoint ammunition can demonstrate a remarkable amount of expansion that will keep the high velocity projectile from traveling very far after impact with both soft and hard objects. This is something varmint hunters, particularly prairie dog hunters have known and demonstrated for years. Interestingly, this is not a new concept. The carbine or rifle has had its roots planted in rural American law enforcement for a long time. The riot-type shotgun replaced its popularity over the years, but the liability issues related to controlling the launching of several projectiles, over a single one, have changed the thinking of administrators. The concern over the probability of an innocent bystander being injured or killed by an errant projectile, as well as the fear of liability has pushed this decision.

Carbine System Considerations:

Many configurations of the tactical carbine exist. Typically, a single carbine is deployed with a tactical light as an added modification. When equipped with various optics, usually some type of emergency iron sights should be available for backup in case optics fail. The folks at Quality Parts Corporation, better known as Bushmaster Firearms, Inc manufactured the heart of the dual-use system we evaluated. The concept revolves around having two available options depending upon the tactical scenario. The standard, or “primary” upper is equipped with iron sights, and the “secondary” upper utilizes specialized optics and suppressor.

We evaluated both units to determine accuracy potential for tactical LE uses. The suppressed and shorter barreled concept provides an interesting platform to support the carbine equipped rifleman role in law enforcement. The scoped upper can be zeroed in, and removed from the weapon’s lower, as the standard upper would normally be the carry configuration. This dual-use concept provides no loss of zero, and the weapons flexibility is twice enhanced. For example, if called in to assist in a drug raid, the officer can arrive on the scene with the weapon in primary configuration for entry use or perimeter defense. If things don’t go down as planned, and a hostage situation or some other change necessitates it, the officer can fall back and effectively become a stand-off marksman by simply changing out the upper assembly – time permitting. Change out can be accomplished in less than one minute assuming both uppers are equipped with bolt and charging handle. One of the biggest advantages of this dual system concept is the elimination of trigger pull unfamiliarity which would occur if switching to a completely separate firearm. Since the users of such equipment typically don’t swap rifles out between individuals, they can be sure that they will experience the same trigger with the rifle in either configuration.

Both Bushmaster M4 barrels had a twist rate of one turn in nine inches. A Harris bipod was also attached to the suppressed flat top. This helps support the extra weight, and provides a stable platform when shooting from the prone position. It also allows some degree of rotation between the rifle and ground to compensate for uneven conditions. The Harris Series “S” attaches to the bottom of the hand guard via an adapter stud. The #5 adapter stud is required for all AR-15/M-16 hand guards. During our evaluation, the unit performed beautifully, and really made shooting from the prone position a piece of cake. We noted no changes in bullet impact by shooting from either the bipod or sandbags. With large field-of-view optics, the swivel bipod enhances large area scanning capability.

Suppressor Observations:

Besides reducing the muzzle blast sound levels, a suppressed carbine kicks less than an unsuppressed one. Its use in law enforcement may be of little benefit in many situations, but with the reduced recoil, it can allow the shooter to see each shot strike through the scope. Increased practical accuracy, and faster follow-up shots are an added benefit. The suppressor used in our evaluation, the Specop II, is no longer in production. Manufactured by Gemtech, one of the unique features of the design was its two-point mounting system. Besides increasing strength, the two-point mount helps provide the proper alignment between barrel and suppressor. It allows full automatic fire with the M-16 without worrying about misalignment caused by the unit unscrewing from the host weapon. The suppressor is 11.2 inches long, 1.62 inches in diameter, and weighs a hefty 2.5 pounds. Finish is dark gray phosphate, and the degree of sound reduction is rated at approximately 35dB. It is a rugged system – built to withstand the abuse of hi-velocity ammunition and full auto fire. The folks at Gemtech currently offer the M4-96D and Predator models for the tactical carbine. Their new units are shorter, smaller in diameter, weigh less, and can be provided with a quick attach/detach capability. These new configurations may be even more appropriate for deployment in the law enforcement or military role due to their lightweight.

The report of the weapon itself is more like an unsuppressed .22LR, with the major sound being the ballistic crack of the projectile surpassing the speed of sound (approximately 1126 fps @ 68oF). This allows the operator to fire the gun without hearing protection since the report is not overly uncomfortable to the ears. Those involved in the tests made the comment that the sound of the weapon is about like an unsuppressed .22 rifle firing subsonic ammunition. The tactical user can easily train without the use of hearing protection, and most found the extra weight out in front was easy to get used to. I prefer dedicating a suppressor to a particular weapon, and leaving it there. This ensures no shift in bullet impact, which usually changes due to the variables involved in mounting/dismounting.

Configuration Options:

A tactical light was installed on the “carry” upper for target identification in low light conditions. No accessory for the handgun, shotgun, or carbine is more important than a flashlight specifically designed for use with the firearm. The light should be powerful, as they are used to illuminate the target and permit target discrimination to prevent shooting a fellow officer or family member. They also back light the firearms’ sights, and allow the operator to concentrate on the front sight. Serving warrants and searching for potentially armed suspects in the dark tends to elevate ones anxiety levels. Besides a sidearm and a radio, a good quality flashlight is a police officers most important piece of equipment.

SureFire flashlights have come to dominate the field of combat lights, but the new guys on the block are giving them some competition. Diamond Products has a new 30,000-candle power (105.5 lumens) Tactically Advanced Combat Mount (TACM III) light system for the AR-15/M-16. Made of unbreakable Delrin plastic, the mount system is very tough, is not affected by recoil, nor does it interfere with the rifles usual attach points. The mount attaches through one of the lower hand guard vent holes. The TACM III is almost exactly the same size as the SureFire model 6P, which is carried on the belts of many officers. The mount correctly secures the light to the right or left side of the hand guard, as top mounting would illuminate the smoke cloud as a round is fired. The TACM III is a very bright light, and easily lights up a small room. ON/OFF activation is accomplished via a remote pressure switch mated to the firearm via Velcro. Powered by two, three-volt lithium batteries, they provide approximately one hour and 20 minutes of continuous use.

For the flat top, there are many sight options available dependent upon the departments needs. Each agency has its own set of variables and circumstances, which must be addressed, before choosing the correct optics. A compromise must be met which will allow the operator to both adequately identify and hit the target throughout a variety of distances. With the perceived use being the mid-to-long range standoff scenario, a top quality 4 power scope is a good choice. The 4-power scope will do well in both shorter urban situations, and longer rural ranges. Considering that throughout WW I, WW II, and Korea, most sniper scopes were 2-1/2 to 4 power, the 4X seems an adequate compromise for today’s LE uses. The 10 X scopes which dominate sniper rigs are great for long range precision work, but lack a wide field of view. If the majority of engagement distances are 100 yards or less, say from one side of the street to the other, the compact 4 power with a wide field of view is probably the way to go. We tested three different optics on the flat top during the evaluation.

The ACOG (Advanced Combat Optical Gunsite) by Trijicon was first selected for testing on the flat top for the secondary carry configuration. The ACOG is a combat proven optical device, which complements the tactical carbine concept very well. It provides both close-up aiming capability, along with excellent stand-off accuracy potential. The internal reticle is calibrated for bullet drop out to 800 meters. It also increases accuracy in low light conditions much better than other optics due to its illuminated reticle. During daytime use, the reticle uses fiber optics which collect ambient light, and project the reticle as black lines. At night, the reticle glows red due to the internal tritium composition. The tritium lamps are guaranteed to glow for at least seven years from the original purchase date.

At 100 yards, the ACOG field of view is 36.8 feet. This compares to about 10.7 feet with a typical 10x sniper scope. It also can be ordered with an innovative quick-aiming configuration called the Bindon Aiming Concept (BAC). When using the two-eye aiming method and moving the weapon, the image is unmagnified. This permits extremely rapid target acquisition. As soon as the weapons movement is stopped, the targeted image zooms into magnification. The ACOG has no external switches or buttons to fail at the wrong time. The unit is waterproof, and is currently in use by U.S. Special Forces. We also tested two other scopes on the flat top which are discussed below.

With the AR-15/M-16 rifle, the line of sight though the iron sights are about 2.5” above the line of the bore. Roughly speaking, sighting the rifle in at 50 yards allows the projectile to strike around 1.25” low at 25 yards, on target at 50 and 250 yards. Maximum impact will be 3” high at 100 yards. This provides the optimum setting for iron sights in the LE scenario. On our test gun, when zeroing the scope in at 50 yards, the impact was about 1 inch low at 25 yards, and about 3.5 inches high at 100. When zeroed in at 100 yards, the impact was 1 inch low at 50, and about 2 inches low at 25.

Shooting Impressions:

The purpose of our tests was to verify the weapons function, reliability, and accuracy in the hands of a trained LE officer. Precise groupings are a good indication of a rifles inherent accuracy, but are somewhat irrelevant in a combat situation when you’re being shot at. In such encounters, the adrenaline will be pumping, and all you want to do is hit the threat and neutralize it. We took the carbine out to the range with several factory loads from Black Hills, Winchester, and Georgia Arms. We elected to utilize ammunition suited to the practical, real-world scenario. No subsonic .223 rounds were tested. It was the opinion of those on hand that a subsonic .223 round has very limited capability. Although it could be suited for very specialized situations, perhaps the use of a suppressed .22LR would be better.

The weather was not great during our first test outing. Outside air temperatures were around 40 F with winds gusting toward us at 15-20 mph. Nonetheless, we persevered to get a feel as to what the carbine was capable of. The ACOG equipped flat top delivered a 5-shot group average of 1.43 inches as fired from the bench at 100 yards. The best group (.98 inches) was obtained with Black Hills 52gr HP Match loads. From 50 yards out, we fired the standard M4 upper with iron sights to determine practical accuracy from the bench. We then mounted the ACOG to the same upper and retested at 50 yards. The standard upper averaged 5-shot groups less than 2 inches with iron sights, and when the ACOG was installed, the 50 yard groups averaged 0.84 inches.

Measured muzzle velocities were essentially identical with or without the suppressor. The ACOG equipped flat top delivered essentially the same accuracy potential at 100 yards as the iron sighted unit did at 50 yards. Two inch groups at these engagement ranges are more than adequate for the carbine support role in the tactical scenario. At both 50 and 100 yards, the ACOG equipped upper is probably more accurate than the pistol caliber carbines in most cases. Shooting the suppressed flat top is like shooting a rimfire rifle due to the reduced recoil. The shooter can watch through the scope and see the bullet impact the target. Shooting from the prone position, we fired at 50 clay birds positioned on the backstop at 100 yards, hitting approximately 95% with the first shot. The carbine seemed to perform best with the Black Hills 52gr HP Match round.

With the group impressed with the flat top accuracy so far, we decided to try a couple of different optics out on the gun. Just for fun, we mounted a 36x target scope on the flat top to see what the gun was capable of. I used the excellent Bausch & Lomb Elite 4000 scope that frequents me on prairie dog hunts out west. The Elite 4000 is high performance optics on steroids. The B&L 4000 is ideal for benchrest shooting since its field of view at 100 yards is only 3 feet. This is obviously not practical for a law enforcement weapon system, but using a scope of this quality can really help define the weapons full accuracy potential. It definitely limits the tactical carbine to benchrest shooting as it is practically impossible to aim holding the weapon offhand. The suppressed M4 produced an overall five shot group average of 1.12 inches using the 36x scope. The best five shot group produced measured 0.86 inches with the Black Hills 68gr HP Match loads.

One of the Sergeants then suggested we try out a Leupold scope they had on hand which was used on one of their bolt-action sniper rifles. We mounted Leupold’s 4.5-14×50 Long Range Tactical (LRT) on the flat top and retested at 100 yards. The Leupold Tactical is very familiar to police snipers since they are employed on many LE bolt guns. It combines excellent optics and rugged construction. On low power (4.5x), the field of view at 100 yards is 18.9 feet, and on high power (14x), is 5.9 feet. This combination of magnification allows the low power setting for urban scenarios, and the high magnification for long range shooting where precise bullet placement is essential. Groups averaged 1.19 inches, with the smallest group (0.85 inches) being obtained using Black Hills 52gr HP Match Moly loads. The LRT is probably more scope than is required for this type of gun, but I think the team went away salivating with the combination. With the variable scope, they could see the guns potential for quiet and accurate performance for both long and short range scenarios.

Lessons Learned:

Even with a fair trigger, the M4 carbine produced some impressive groups. We did notice that the rifle was prone to throw the first shot slightly, and explains why some of the groups were not as consistent as one would expect. This is probably explained by headspace variance, which results from the difference in speed and force during loading the first round. Past 50 yards, this first shot variance could be disastrous if a surgical strike is required. The user must be aware of this, and compensate accordingly. Our carbine seemed to throw the first shot up and to the right slightly most, but not all of the time. The same ammunition consistently produced sub MOA groups with a Remington PSS bolt action, so I would attribute this phenomenon to the gun and not the ammunition.

The 4 power ACOG allows easy target tracking thanks to the wide field of view. The ability to see the bullets strike the target allow quick follow-up shots with ease and effectiveness. Although the ACOG can be mounted to a removable carry handle with a back up rear sight, I would have preferred mounting it closer to the centerline of the bore. This would be more comfortable to the average shooter utilizing the collapsible buttstock configuration. Obviously the B&L 4000 is too much scope for this carbine. Although it is an excellent piece of optics, it is obviously designed for, and better suited to benchrest shooting. Sight picture is very sharp and crisp, and brings small targets up close and personal. Its adjustable objective is easy to turn and surprisingly accurate for range estimation. It can practically be used for a range-finder since the scope comes into focus precisely at the marked distance on the objective ring. It allows you to determine how accurate your gun is very quickly. A wider field of view would be great to have, but this is the trade-off for clear and precise long-range magnification. The Leupold LRT definitely has its advantages for both the short and long range scenario. The Leupold seemed to have a slight advantage in optics clarity and brightness over the other two scopes. Also, the Leupold had easier focusing adjustments, and seemed to produce less eye strain on the shooters. The side focus adjustment is easy to reach and adjusts for parallax variations. Most other scopes have objective adjustments, which are on the forward part of the unit, further away from the shooter. The LRT also had the most generous eye relief of any of the others tested.

One issue learned related to the use of the suppressed upper is routine maintenance. After cleaning, any cleaning oils which remain within the can, will produce a dramatic smoke plume for several shots. The smoke can obstruct the operators? field of view for several seconds. This may be no big deal for the casual shooter, but is totally unacceptable for LE use. We introduced one short aerosol burst of oil into the chamber, and allowed the oil to drain downward into the can between shooting sessions. Six or seven shots were required to completely eliminate the smoke plume. We checked the suppressor after each series of shots to ensure it remained tightly secured in place. No loosening in the mount was noted throughout the shooting sessions. This also included several full auto bursts utilizing a 100 round Beta C-MAG.

This carbine concept also allows the option of select fire. Tactical use of full auto fire is best kept to two or three shot bursts in the LE scenario. Long bursts do serve such practical purposes as checking the stability of the weapon, and having fun. I’ve never encountered a shooter who would turn down a “go ahead” offer to cut loose with a loaded magazine on full auto. The weapon we tested behaved beautifully in full auto with either configuration, and is especially fun to shoot with a fully loaded C-MAG. With the many early military M-16’s being surplussed to LE departments, the armorer can build upon the option of select fire lowers if the department requires this option.

Maintenance, Carrying, and Storage:

As recommended by Mark White of Sound Technology, a suppressed weapon should be stored with the muzzle pointing down and with the action open to allow venting so internal moisture can evaporate. This is somewhat of a dilemma for the officer who needs to have his carbine system stored in a hard case most of the time. Internal corrosion is the enemy here, and must be addressed. With the tactical user’s main concern being the cold-bore shot, the same maintenance procedures should be established and repeated after each shooting session. This will ensure that the operator knows where the first shot will impact.

Experience has shown that using suppressors which must be disassembled for maintenance is only asking for trouble. Sealed cans are the way to go, and current trends are confirming that point. The use of ultrasonic cleaners in conjunction with solvent soaks is much safer, in that it reduces the potential of improper reassembly. The “depot” level of maintenance would include a complete solvent soak in conjunction with ultrasonic cleaning. After cleaning and reassembly, the weapon would need to have a recheck of zero and adjustments made prior to deployment. With most suppressors on the market being sealed units, the problems associated with disassembling a suppressor for cleaning have gone away. Ultrasonic cleaners and solvent are very effective at breaking up accumulated fouling, and the Specop can also be cleaned by this method.

For protection during daily duty use, a good quality carrying case should be part of the system. This allows both carry and storage of the rifle and extra upper assembly in the same container, ensuring that they are always together. There is however, a danger with a well-sealed case. If moisture is present when the case is closed, it can do severe damage to a firearm’s finish. Some common sense maintenance routines are in order here to keep corrosion at bay.

Conclusions:

Many have predicted that the close of the 20th century would be the end of the era for the rifleman. This is no surprise to me. I grew up in the southern United States, and like many living in rural areas, we routinely carried a rifle to obtain food for the home. Developing good rifle skills was a way of life, a necessity to help out the family. It wasn’t until I started my law enforcement career that I had to develop pistol skills, knowing all along the limited range of the standard sidearm as compared to a long gun. Not everyone is suited to being a rifleman. The training and deployment necessary for law enforcement personnel must be carefully thought out. Marksmanship, physical condition, intelligence, personality, and psychological makeup are factors that must be included in the selection process. Those selected for this role should be provided the necessary tools and training to fulfill this duty. Besides the equipment, the proper training will ensure the big three: marksmanship, accuracy, and consistency.

The M-4 “tactical system” provides excellent accuracy and performance within a fairly compact sized package. The suppressed flat top adds significant additional capability to the original carbine. Whether used for law enforcement applications, or for quieter long range target work, the shooter will be impressed with its capabilities. It is a good choice to match requirements for the tactical scenario. The civilian NFA collector/enthusiast will also appreciate its use for various competitions and quiet target shooting. This package certainly turned heads at the shooting range, and all were impressed with the overall concept. It provided more-than-acceptable accuracy for the LE rifleman role. Although not a consistent MOA performer, it delivered some sub-MOA groups with the optimum combination of ammunition and optics.

Sources:

Bushmaster Firearms
999 Roosevelt Trail, Bldg. #3
PO Box 1479
Windham, ME 04062
1-800-998-SWAT

Black Hills Ammo
P.O. Box 3090
Rapid City, SD 57709-3090
605-348-5150

Georgia Arms
P.O. Box 238
15 Industrial Court
Villa Rica, GA 30180
1-800-624-6861

Winchester/Olin Corporation
East Alton, IL 62024-1174
www.winchester.com

Diamond Products Mktg., Inc.
2300 Commerce Park Drive #6
Palm Bay, FL 32905
407-726-0644

Gemtech
Gemini Technologies, Inc.
P.O. Box 3538
Boise, ID 83703-0538
208-939-7222

Sound Technology
Mark White
P.O. Box 391
Pelham, AL 35124
205-664-5860

Trijicon, Inc.
49385 Shafer Avenue
Wixom, MI 48393-0059
248-960-7700

Harris Bipods
Barlow, Kentucky 42024
502-334-3633

B-Square Mounts
P.O. Box 11281
Fort Worth, TX 76110-0281
1-800-433-2909

Bausch & Lomb
9200 Cody
Overland Park, KS 66214
1-800-423-3537

Leupold & Stevens, Inc.
PO Box 688
Beaverton, OR 97075
503-526-5195