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Home Articles Articles by Issue Volume 17 V17N2 (2nd Quarter 2013)

BLANK FIRING WEAPONS FOR TACTICAL DEMONSTRATIONS

SAR Staff by SAR Staff
September 21, 2022
in V17N2 (2nd Quarter 2013), Articles, Articles by Issue, Event Coverage, Guns & Parts, Search by Issue, Volume 17
BLANK FIRING WEAPONS FOR TACTICAL DEMONSTRATIONS
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By Robert Bruce

As most anyone who has experience with custom adapting semi- and fully-automatic small arms for blank firing will be quick to caution, “It ain’t easy.”

We spoke to some of the re-enactors who turned out for this year’s Tank Farm Open House about the trials, tribulations and often considerable expense involved. It quickly became apparent that a comprehensive look at the many technical challenges presented by a bewildering array of vintage weaponry would be far beyond the scope of this featurette.

So, what follows are a few photos to whet your appetite, snippets of conversation with “tricks of the trade” and some sources to get you started.

Portraying a Vietnam War SOG operative, John ìMoochî Muccia shows us a 5.56mm crimped nose blank and the carefully machined ìHollywoodî BFA that makes his XM-177E2 rock and roll. The adapter slips into the barrel and is held in place by the flash suppressor with no costly modification to the weapon. (Robert Bruce)

Military Issue BFAs

Aside from the obvious ease in which revolvers and bolt action rifles may be put to use, many semi and full auto military weapons have standard issue BFAs (blank firing adapters). These are devices that function with blank cartridges specifically manufactured for the purpose of safe and somewhat realistic tactical training.

Typically, these are external screw-on muzzle devices that restrict some of the propellant gas when firing in order to cycle the action. Examples include those for U.S. M1 Garands and .30 caliber Brownings that work splendidly with those distinctively stubby, government issue, red lacquer and cardboard-sealed blanks.

But these have several drawbacks including a conspicuous look that’s unacceptably phony to reenactment purists, and the nearly impossible task of finding long-obsolete GI blanks. Yes, they can be made to work with some of the newly manufactured crimped case blanks, but that’s not the real issue.

Like their BAR, the USMCHC’s M1919A4 Browning Machine Gun is the real McCoy, but in this case fitted with GI issue blank adapting components. A screw-on muzzle booster replaces the standard one and a special block is in place in the feedway that only allows entry of the short GI issue blanks. (Robert Bruce)

“Hollywood” BFAs

Long before there were enough reenactors to make it commercially viable to manufacture blank adapters that didn’t look like blank adapters, firms like Stembridge Gun Rentals in Hollywood were making their own for gangster and war movies.

These were typically machined in-house; made to hide inside barrels, compensators or flash hiders, and specially “tuned” to make Tommy Guns and the like function properly with custom loaded “hot” blanks.

It seems that GI blanks didn’t consistently produce enough flash for the film stock of the times so gun wranglers started rolling their own, adding flash powder and other things to the mixture. While these produced the spectacular flash that we have come to expect and demand, the resultant overpressure requires careful calculation of the gas restriction holes.

In Hollywood and everywhere else, it’s tricky to get the right combo of flash and reliable cycling of the mechanism without blowing the gun up. Hold that thought as you read on.

WWII German mountain troop re-enactor Gilbert White shows us his highly realistic BFoNG (blank firing only non gun) full auto replica MP40. This is a BATFE-approved, no paperwork required burp gun originally manufactured by SS Room. The secret of its acceptability as a working non-gun to the notoriously no-go Feds is its backwards-firing action where propellant gas is ducted back to the muzzle end. (Robert Bruce)

Avoiding “Farbyness”

Serious re-enactors put a premium on looking right when they go into the field. Their uniforms, equipment and weapons have to be faithful to those of the soldiers being portrayed.

The sin of “farbyness” (a derogatory slang term in reenacting circles some contend is derived from inferior substitute items supplied to WW2 German soldiers and civilians by the I.G. Farben company and others) is to be avoided.

So the Hollywood BFA concept is near and dear to them for retrofitting real guns. To this end, today’s re-enactor community is supported by a surprisingly robust cottage industry of firms and individuals making hide-in-the-barrel devices and blanks to go with them.

Keeping in mind the absolute necessity for safety, it’s more than prudent to consult closely with your BFA maker and your blank supplier. Hole too big and blanks too weak and your gun’s a no-go. Hole too small and blanks too hot and your gun’s in pieces – some of which might be sticking in you or your buddies.

A powerful shock wave raises red dust in front of the M4 Sherman Tank thatís supporting the Marines in their bunker assault when it fires a massive blank cartridge from its 75mm main gun. Right on cue, a powder charge buried in front of the bunker is remotely detonated to simulate a near-direct hit. (Robert Bruce)

Blank Firing Replicas

NFA weapons – real live machine guns – are very, very expensive and there’s natural squeamishness about the kinds of machine shop mutilations that must be inflicted in many cases for blank adapting.

So consider the alternative provided by some clever replica makers offering subguns and the like that are relatively cheap and completely legal without all that government paperwork.

The USMCHC’s M1918A2 Browning Auto Rifle is a real full auto, rigged for blank firing with a special ìHollywood BFA’ flash hider. Extremely powerful full sized blanks give it plenty of gas to cycle the action. (Robert Bruce)

Gas Gun Kits

The last alternative we’ll explore here comes in the form of contraptions dispensing measured doses of oxygen-propane mixture that are electrically fired. Done right, they produce satisfyingly sustained bursts of flash and report that come close to real machine gun firing.

These have the advantages of being relatively inexpensive to build or purchase, they’re cheap to operate, and they rig up nicely to affordable non-gun replicas.

On the minus side is the farbyness of rubber hoses, battery boxes and twin “ammo” tanks. Not to mention the trickiness of getting the whole rig to work like it’s supposed to instead of producing the equivalent of faint farts.

A WWII German paratrooper, formidably armed with a full auto MG42 thatës feeding crimped, green-marked 8mm blanks. Their output is matched to work in concert with the BFA thatís hidden inside the gunís muzzle booster/flash hider. (Robert Bruce)

Resources

Now, if you want to hit the woods or demonstration field for some safe and reasonably realistic battle reenacting, check out these sources. But before you start buying stuff to modify your guns, get plugged into a few of the bulletin boards and other forums. There, some RKIs (reasonably knowledgeable individuals) have already posted solutions to lots of vexing problems and just might be willing to point you in the right direction.

Under a shelter rigged from a BMP Amphibious Infantry Fighting Vehicle, William Richter (glasses) and Marek Goralczyk, portraying Cold War era East German soldiers of the 16th Motorized Rifles, prepare for their tactical demonstration. Unterofficer Richter conducts a quick refresher on handling and operation of the RPD machine gun in the foreground and the MPi variant AK47 type rifle. AKs are robust and reliable assault rifles that work perfectly with the standard military issue screw-on BFAs. Surplus 7.62 x 39mm blanks are cheap and plentiful and have the added bonus of a loud report and plenty of flash. (Robert Bruce)

BFAs, Barrels, Etc.

Guiette Manufacturing, Inc.
(www.guiettemfg.com)

Tommy Gunner.Com
(www.tommygunner.com)

Gun Parts Corp.
(www.gunpartscorp.com)

Demonstrators from the USMCHC come on line during their tactical demo practice run to function fire their weapons. A lucky click of the shutter captures the impressive fireball produced by a blank-adapted M1 Garand. The BAR gunner is not so fortunate. Several tries at tuning its gas regulator were needed before it would run. (Robert Bruce)

Blank Ammunition

Atlantic Wall Blanks
(www.atlanticwallblanks.com)

Joe Swanson
Motion Picture Blanks
(www.joeswansonsmotionpictureblanks.com)

Boland Production Supply
(www.bolands.net)

The Scottish Recce unitís Bren is a live gun, readily modified for blank firing using a standard issue, muzzle mounted adapter. Regular magazines are suitable for long blanks but a spacer block has to be added to keep short blanks from shifting out of optimal feeding position. (Robert Bruce)

Blank Firing Replicas

Collector’s Armoury, Ltd.
(www.collectorsarmoury.com)

Max Armory
(www.maxarmory.com)

The muzzle of this G43 is fitted with a screw-on gas-restricting BFA, ìtunedî to work with Atlantic Wallís specially formulated 8mm blanks, identified by their red painted tips. (Robert Bruce)

Gas Guns

Replicas and Models, Inc.
(www.replicasandmodels.com)

IRAC, Inc.
(www.iracinc.com)

Int’l Repo-Depot, Inc.
(www.intlrepo-depo.com)

WW2 Steel
(www.ww2steel.com)

Bismark Guns and Artillery
(www.bismarkguns.com)

7.92mm Besa machine gun in the turret of this Humber MKIV armored car is a replica, rigged with an electrically fired oxygen-propane simulator. Properly tuned, it produces satisfyingly realistic auto weapons fire. (Robert Bruce)

Pyrotechnic Supplies

Rolling Thunder Pyrotechnic Corp.
(www.americanpyrosupply.com)

Firefox Enterprises, Inc
(www.firefox-fx.com)

Z11 Pyro Supply
(www.ziipyro.com)

Forums

www.reenactor.net
www.angelfire.com
www.ppsh41.com
www.milsurps.com
www.90thidpg.us

This article first appeared in Small Arms Review V17N2 (June 2013)
Tags: 20132nd Quarter 2013BLANK FIRING WEAPONS FOR TACTICAL DEMONSTRATIONSJUNE 2013Robert BruceV17N2
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