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Mendoza RM-2

Light Machine Gun (LMG) [ 1947 ]

The Mendoza RM-2 marked the end of the Mendoza line of light machine guns.

Authored By: Staff Writer | Last Edited: 08/01/2017 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

Mexican engineer Raphael Mendoza found success with his C-1934 Light Machine Gun which was accepted for service with the Mexican Army prior to World War 2. The weapon was chambered for the 7x57mm Spanish Mauser cartridge and proved to be a reliable system, easy to produce and cheap to manufacture while not lessening the quality of the weapon. In 1945, the weapon was refined to become the Model 45 with its shorter barrel, perforated muzzle brake and refined receiver while being chambered for the powerful American .30-06 Springfield cartridge. During World War 2, there arose a pressing American need for weaponry of any kind and Mendoza moved to rework his light machine gun series to perhaps land the lucrative defense contract from the spending American government.

The initiative produced a revised light machine gun that was chambered for the .30-06 Springfield cartridge as well as sans the "quick-change" barrel feature of the original production models (something of a drawback considering this to be an air-cooled, heavy volume, repeating fire weapon system). The new weapon was known as the "RM-2" and was designed to fulfill roughly the same function as the M1918 BAR. The weapon fed from a 20-round magazine fitted into the top of the receiver which forced the rear and front sights to be offset for aiming. A bipod helped to control the forward weight of the weapon when planted. A new slotted muzzle brake was fitted while the forward handguard and shoulder stock were wood fixtures. The receiver and barrel assembly were completed in metal. The charging handle was set to the right side of the body while a fire selector was set to the left - offering a safety, semi-automatic and full-automatic fire mode. Despite the changes, the RM-2 was still lighter than her contemporaries and cheaper to produce. Field-stripping of the weapon was facilitated by a hinged shoulder stock and rear receiver region that opened down to expose the internal workings.©MilitaryFactory.com
Unfortunately for Mendoza, the war ended by September of 1945, bringing an end to the hope that the American military would be requiring large scores of automatic weapons. Mendoza then tried unsuccessfully to market the weapon to the Mexican Army who were still utilizing his 1934 and 1945 creations in number. In 1947, some 50 prototypes were sent to the Mexican Marines for evaluation but this endeavor came to naught. To make matters worse, strict Mexican export laws concerning weapons negated their sale overseas, essentially bringing an end to the Mendoza line of machine guns. Some RM-2 examples fell into museum hands while the lineage more or less fell to history.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.


Service Year

Mexico national flag graphic


Light Machine Gun (LMG)

National flag of Mexico Mexico
(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
1,092 mm
42.99 in
Barrel Length
609 mm
23.98 in
Empty Wgt
13.89 lb
6.30 kg

Offset Iron Front and Rear


Gas-Operated; Open Bolt

Open Bolt
System utilizes internal mechanism where bolt and associated working components are set to the rear of the receiver with no cartridge chambered; trigger actuation moves bolt forward, chambers cartridge, and fires bullet in single action - ultimately resetting during the complete cycle by way of the generated energy.
Gas-operated system is featured, typically involving a gas cylinder and rear-driven piston directing energy to the bolt component.
(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)


.30-06 Springfield (30-caliber M1906)

Rounds / Feed

20-round detachable box magazine
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.
Max Eff.Range
1,968 ft
(600 m | 656 yd)
Muzzle Velocity
2,750 ft/sec
(838 m/sec)

RM-2 - Base Series Designation

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Images Gallery

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Image of the Mendoza RM-2
Right side view of the Mendoza RM-2 Light Machine Gun

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