Excluding the many Browning designed weapons, the Madsen machine gun holds the distinction of being one of the oldest and longest produced machine guns in history. Though used by thirty four different countries, it was never adopted officially by any major nation. It has been chambered in every military caliber used in the world, rimmed or rimless, from 6.5mm to 25mm. Little has been written about this remarkable weapon that introduced the concept of the light machine gun. From its conception in 1902, it remained in continuous production until 1970 when Madsen went out of business.

Both John Browning and Sir Hiram Maxim did what would be considered by today’s standards, virtually impossible: they converted a lever action Winchester 1873 rifle to full automatic. Browning utilized the gas from the muzzle blast to operate a flapper that worked the lever action of the Winchester Rifle and Maxim took the Winchester and made the recoil forces at the butt plate operate the same lever action. Somewhere along the line (approx. 1898) the concept of converting a single shot repeating rifle into a full auto landed in Denmark. Julius Rasmussen used as his inspiration the Peabody-Martini (British) falling block single shot rifle. On June 15th, 1899, he applied for the first patent employing this design. However, in 1902, Lt. Theodor Schouboe was granted a patent on the same principle. No one is clear how this occurred. The gun went on to be produced by Dansk Rekylriffel Syndikat under the patents supplied by Schouboe and, for some reason, the gun was named after W.O.H. Madsen, the Danish Minister of War. It was also manufactured in England and known as the Rexer or DRRS.

During its sixty eight years of production there were many minor variations of the Madsen – over one hundred are known. However, there were basically three primary models: the first, a magazine fed LMG, the second a belt feed tank or aircraft model, and the third proved the most fantastic adaptability of the design. In 1926, The Dansk Industries announced the development of a 20mm automatic aircraft cannon utilizing the same Madsen mechanism. Though not widely used, a hydraulic buffer allowed for a 23mm version used in German Fokker aircraft.

The first US testing was done at the Springfield Armory on September 9, 1903. A total of 7,163 rounds were fired, during which enough malfunctions occurred to justify the official conclusion that the Madsen weapon had not reached a state of reliability to warrant adoption. Though Lt. Schouboe himself had conducted the firing, he had to rise to a kneeling position to clear stoppages – a condition with which one can certainly sympathize but can be fatal in combat. US special order No. 86 dated August 5, 1921 provided for a further test of the Madsen in .30-06 at Fort Riley, Kansas. Supposedly redesigned, the Model 1919 included provision for both a bayonet and elaborate, detachable flash hider. It was still deemed unsatisfactory.

The Germans experimented with a variety of newly developed weaponry and, as a stopgap, the Germans used approximately 500 Madsens in World War I (referred to as a Muskette and given the designation Leichte Automatische Muskette M15) until they developed the Maxim 08/15 that then became their light weight machine gun of choice.

In 1923, the Dansk Syndicate assigned its chief engineer, Mr. Hambroe, to redesign the Madsen mechanism for more efficiency. All he did was to add a muzzle booster that greatly increased the cyclic rate to 1,000 rounds per minuet making it ideal for aircraft use. He also added a strong spring buffer to absorb the shock of the booster. The real beauty of the aircraft gun was its ability to use disintegrating links and could be synchronized to the propeller.

During WWII, America was equipping the Dutch East Indies with Johnson automatic rifles. Johnson Automatics, better known as Cranston Arms, supplied barrels for the Madsen LMG.

In 1950 the last evolution of the design featured a quick change barrel and a tripod soft mount with a remote firing devise.

By all concepts of logic, this gun should not work as it is a mechanical nightmare – but it does indeed work. The key to its operation is a cammed “switch plate” that allows recoil to perform the actions of loading, firing, extracting, and ejecting the spent rounds. The term “switch plate” is a 19th century expression of a device that caused a sequence of functions to be completed in rapid succession for a railroad train. In this case, a switch plate multi-tasks the functions for the machine gun and is the mechanical heart of the weapon. The Madsen is known as a long recoil system, i.e., the barrel and breach mechanism reciprocate together inside of a barrel shroud and receiver box. This action works the lever that, like the Martini Rifle, accomplishes the task of ramming the round into the chamber with such force that it often deforms the cartridge case. If the round does not fire it is difficult to clear the stoppage.

Test firing was conducted with Madsen Mle. 1950, serial number 1475. The gun did not function flawlessly. It soon became evident that great care had to be taken in placing the magazine into the top or it would spill rounds into the magazine well. When a shell got down into the mechanism it did not chamber or fire and it was a chore to remove the offending round.

As mentioned above, the power of the ramming arm often distorted the case making it a ramrod job to remove from the chamber. Then, one had to carefully work the case to the ejection port that is part of the reciprocating mechanism attached to the barrel. Nevertheless, when it did work, it was a joy to fire. Amazingly, it was found that the magazine was unnecessary to fire the weapon. Four rounds could be dropped into the magazine well and the gun would fire all four. Single shots were readily obtained as the cyclic rate was approx. 550 rpm. The bipod was not sturdy enough to prevent dumping the machine gun over into the dirt. The offset sights were sufficient and accurate. The magazine is a top feed double stacked 30 rounder until it enters the gun. It then becomes a single feed with the round being retained by a large spring that also acts as a magazine catch. There are several positive points about the Madsen design. First, its top magazine feed allowed gravity to enhance its entry into the mechanism; second, a bottom feed that was positive and powerful; and finally, the Madsen fires from an open chamber reducing the chance of a cook off.

When one carefully examines this design, there is a tendency to write off the Madsen as a “mechanical monstrosity” that like the Bumblebee should not fly. But, upon more careful examination, the designer, whoever he may be, took a tried and true Martini rifle and applied 19th century railroad technology, added robust parts, and designed a machine gun that is found in museums around the world. At the old MOD Pattern Room there was an entire long table devoted to Madsen LMGs, with more national crests than the fabled Roundtable. Many armies tried the weapon and modified strategies around it to apply the weapon. This is an unsung pivotal weapon in the small arms field. In the end, it was a versatile design that deserves a better niche in history.

As with his rifle, Melvin Johnson’s LMG was only used by the United States military in limited numbers. While the M1941 semi-automatic rifle had the M1 Garand as its main adversary, the LMG competed against the legendary BAR. Unfortunately, development of both Johnson’s weapons were untimely, becoming available only after the Garand and BAR had already been placed in mass production for WWII. The Marine Corps adopted Johnson’s weapons only when the BAR and Garand were not being produced in sufficient numbers to fulfill the wartime demand. The Johnson LMG, like the M1941 semi-automatic rifles, were manufactured for Johnson Automatics by a subcontractor, Cranston Arms of Rhode Island.

In reality the Johnson design had many modern and innovative features. The 1941 Model was much lighter than the BAR at 14.2 pounds with the bipod. Another very important feature, especially for a weapon of its type, was a removable barrel that could be easily replaced in the field. The weapon was select-fire, and fired from a closed bolt in the semi-automatic mode, and fired from an open bolt when in full-auto. The modes of operation: safe-fire and automatic were controlled by a single “change lever”. The overall length of the weapon was 42 inches, while the standard barrel was 22 inches in length. The barrel featured a 4-groove 1 in 10” twist, and according to the operator’s manual, could be replaced “in 5 to 6 seconds.” Mr. Johnson preferred that his weapon be referred to as an “automatic rifle” or “light machine rifle” rather than a “light machine gun.” He often compared his weapon to the 8mm German paratrooper automatic weapon, the FG-42 that could, and often was, fired from the shoulder like a rifle. Johnson wanted to convey that his weapons were not simply “light machine guns” but rather versatile “automatic rifles” that could easily be fired from the shoulder when necessary.

The rear sight on the LMG is a flip up aperture style, calibrated in yards, the sight featured two apertures, the upper one for up to 1,000 yard range and the other (placed 49 MOA lower) designed for barrage fire up to 1500 yards. The adjustable rear sights were supplied to Johnson Automatics by either the Lyman or Marbles Company. The blade style front sight is unusually high, (similar to that of the M16 rifle) because of the “straight line” configuration of the stock. The twenty round capacity, single feed box-style magazine is also unique, as there are no feed lips. The feed lips are machined into the receiver. Also located inside of the receiver is a rotary magazine mechanism similar to that of the Johnson semi-automatic rifle. The box magazine is inserted into the left side of the receiver. The magazine release lever also serves as a cartridge-retaining device to keep the loaded rounds from flying out of the magazine in the absence of conventional feed lips. When the magazine is inserted into the weapon, the magazine support guide hook cams upward on a ramp and releases the cartridges in the magazine. The magazine spring then locks onto a shoulder on the ramp and locks the magazine into place. The cartridges are then fed into the integral magazine inside of the receiver. An additional five rounds could be loaded into the receiver making the total capacity of the weapon 25 rounds. The magazine could be easily recharged while in the weapon via the M1903 rifle stripper clips. The magazine was overly long because of its single stack/single feed design. The magazine body was also easily damaged.

A detachable folding bipod was also featured on the Model 1941 LMG. The bipod is placed well back from the muzzle, allowing the weapon to be traversed over a wide area very quickly. The M1907 sling was often issued with the weapon, as well as a web style sling. A tan color bag type magazine pouch was designed for issue with the Johnson, for carrying the long, curved Johnson magazines. The pouches are extremely rare today.

It has often been reported that 10,000 of the Johnson M1941 Light Machine Guns were manufactured, but the actual number of weapons produced was much less. These were adopted and used during World War Two by U.S. Marine paratroopers and the Marine Raiders in the Pacific Theater, as well as the U.S./Canadian Army First Special Service Force in Italy and North Africa. The Netherlands also ordered a substantial number, but few were delivered before the Dutch East Indies fell into Japanese hands. A few of the light machine guns were believed to be procured and used by the French. Generally the weapon’s performance was acceptable, although there were a few reports that it was too fragile for extreme combat conditions. The long leaf spring extractor was especially prone to failure under extended combat use.

An improved model was introduced in 1944. This version was known as the Model 1944 Johnson Light Machine Gun. Problems and experience from the first design generated the improvements that were incorporated in the 1944 Model. The receiver was redesigned for more positive feed to prevent jamming. A redesigned tubular buttstock was manufactured from Micarta, and the pistol grips were made of plastic, no wood furniture was used on the M1944. A cleaning kit was stored in the lower portion of the stock. The bipod of the earlier model was replaced by an adjustable nine position, folding 1.7 pound integral monopod. When the weapon was fired from the shoulder the folded monopod served as a forearm for the support hand. The weapon weighed a total of 14.7 pounds. The M1944 operator’s manual states that the cyclic rate is variable from 350 to 750 rounds per minute by changing the buffer springs in the stock. The only tool required for field stripping the weapon is a standard 30’06 cartridge. A special 20-inch barrel was offered as an option for cavalry or paratrooper use. The Johnson Light Machine Guns shared many of the same parts used in the M1941 semi-automatic rifle.

Both the Johnson rifle and the light machine gun saw limited service during WWII with the Office of Strategic Services. The OSS found that the Johnson weapons when disassembled were easily concealed and offered a lot of large caliber firepower. Fidel Castro’s troops also used Johnson’s weapons in his revolution against Cuba’s Batista government in 1958-59. Ironically anti-Communist Cuban Guerrillas also used Johnson weapons against Castro in the ill-fated struggle to reclaim their homeland.

Development of the Johnson Light Machine Gun concept continued after WWII, resulting in a Model of 1945 LMG. There was little post war interest and the light machine gun development program was terminated in 1947. In the 1950s the Israelis manufactured a close copy of the Johnson design called the Dror. The Israeli version was chambered in 8mm Mauser and .303 British. Like the Johnson before it the Dror was only manufactured in limited quantities.

Melvin Johnson continued in the firearms business after the war ended. His company specialized in converting military rifles into sporters for hunting. He also offered his M1941 rifles in both sporter and military configurations. Melvin Johnson died in 1965 at the age of 55.