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Johnson LMG


Light Machine Gun / Squad Support Weapon (1941)


Infantry Small Arms / The Warfighter

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The Johnson Light Machine Gun was used in limited quantities by several forces of the world during World War 2.



Authored By: Staff Writer | Last Edited: 08/01/2017 | Content ©www.MilitaryFactory.com; the following text is exclusive to this site.
The Johnson Model 1941 Light Machine Gun (LMG) was a product of the Cranston Arms Company of Providence, Rhode Island and categorized as a light support weapon. The Model 1941 emerged from the work by Melvin Johnson, Jr. who served as a reservist in the United States Marine Corps (USMC). Johnson furthered both a semi-automatic rifle design (to compete with the M1 Garand) as well as a light machine gun form - the latter borrowing much from the rifle including its short recoil, rotating bolt system. Work on the weapon spanned from 1936 to 1938.

The gun was chambered for the .30-06 Springfield cartridge and the rounds were fed through a 25-round detachable box magazine inserted into the left side of the receiver. The magazines were a single stack arrangement which promoted a very slim, though lengthy, profile. Additionally, the weapon supported reloading via single cartridges or the American standard five-round clip (charger) from the right side of the receiver with the box magazine in place. This feature was born from the military requirement to have the LMG be belt-fed.
Overall weight was 13lbs with an overall length of 42 inches and a barrel measuring 22 inches long. Rate-of-fire was adjustable by way of managing the tension of the buffer spring - between 200 and 900 rounds per minute being theoretically possible. The short-recoil method of operation made the Johnson LMG one of the few light machine guns to actually use this action in its design. The machine gun also incorporated single-shot and full-automatic fire functionality which used a closed bolt and open bolt operation, respectively.

By 1940, the design was more or less finalized and production began that same year while spanning into 1945 - the final year of World War 2. However, the guns were manufactured to a high standard which meant that it made a rather poor choice for wartime serial production where expediency in stocking inventories was key. The United States Marine Corps (USMC) trialled the weapon, but this exercise did not lead to formal adoption of the system and this left the weapon to the foreign market to which the Dutch placed the only notable order. The Johnson LMG was intended to stock the Netherlands East Army in response to encroaching actions by the Japanese Empire nearby. However, the Japanese advanced on Dutch territory and future orders were cancelled since their arrival would come too late to be useful. It was only through limited use by Army Rangers and other special operative groups during the war that the Johnson LMG persevered to the end of the conflict (and in production). It also saw service with the Philippine Army during the Japanese occupation of the country and with select forces of Canada and the United Kingdom.

At its core, the Johnson Model 1941 was a functional, though complicated and expensive, portable machine gun designed to provide the infantryman with a less cumbersome alternative to the World War 1-era M1918 Browning Automatic Rifle (BAR) while retaining all the usefulness of the .30-06 cartridge it employed. Some reports noted weak design (leading to breakages) and regular jamming of the action when the weapon was pushed under battlefield conditions. The primary production model was the M1941 which was identified by its wooden buttstock as well as a folding bipod held under the fore-end. The alternative model became the M1944 which brought along a twin-tube shoulder stock (replacing the wood one) and a cylindrical monopod (taking the place of the original bipod).

What examples of the Johnson LMG that remained in circulation after the Japanese surrender stayed in action into the 1960s.

Specifications



Service Year
1941

Origin
United States national flag graphic
United States

Classification


Light Machine Gun / Squad Support Weapon


Cranston Arms Company - USA
National flag of Canada National flag of the Netherlands National flag of the Philippines National flag of the United Kingdom National flag of the United States Canada; Netherlands; Philippines; United Kingdom; United States
(OPERATORS list includes past, present, and future operators when applicable)
Fire Support
Capable of suppressing enemy elements at range through direct or in-direct fire.


Overall Length
1,100 mm
43.31 in
Barrel Length
560 mm
22.05 in
Empty Wgt
13.01 lb
5.90 kg
Sights


Iron Front and Rear


Action


Short Recoil Operated; Single-Shot / Full-Automatic

Full-Automatic
Rounds are automatically ejected from the breech, a new cartridge stripped from the feed and set in the chamber, and rounds are continuously fired so long as the trigger is pulled and an ammunition supply exists.
(Material presented above is for historical and entertainment value and should not be construed as usable for hardware restoration, maintenance, or general operation - always consult official manufacturer sources for such information)


Caliber(s)*


30-06 Springfield

Rounds / Feed


25-round detachable box
Cartridge relative size chart
*May not represent an exhuastive list; calibers are model-specific dependent, always consult official manufacturer sources.
**Graphics not to actual size; not all cartridges may be represented visually; graphics intended for general reference only.
Rate-of-Fire
600
rds/min
Muzzle Velocity
2,800 ft/sec
(853 m/sec)


Johnson Light Machine Gun - Base Series Name
Model 1941 - Model of 1941 with wooden shoulder stock and folding metal bipod.
Model 1944; Model of 1944 with twin-tube shoulder strock and tubular monopod.


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