M240

🇺🇸United States
FN America
1977 – Present
Overview
M240
The M240 is a belt-fed, gas-operated medium machine gun that chambers the 7.62×51mm NATO cartridge. It is widely used by the U.S. military for its reliability and effectiveness.
Specifications

General

TypeGPMG
Caliber7.62×51mm NATO
Weight Kg12.5 kg
Feed Systembelt
Rate Of Fire Rpm950 rounds/min
Effective Range M1,800 m
Muzzle Velocity Mps853 m/s
Research Notes

U.S. designation for the FN MAG family

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The M240 is the U.S. military's 7.62 mm medium machine gun family derived from the Belgian FN MAG 58.

The M240 is the U.S. military designation for the FN MAG 58-derived 7.62x51 mm NATO medium machine gun family. FN America describes the M240 general-purpose machine gun as adopted by the U.S. military in the late 1970s and continually used since introduction. FN's own company history also notes that its Columbia, South Carolina plant was opened in 1981 with production of the FN MAG/M240 for the U.S. Army as a central purpose. This gives the equipment page a clear origin story: Belgian design lineage, U.S. production, and long-term institutional adoption across American ground, vehicle, aircraft, and naval applications.

Reliable belt-fed suppressive fire

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The M240 family provides 7.62 mm sustained fire for infantry, vehicle, coaxial, aircraft, and mounted roles.

The M240's value is reliability and sustained 7.62 mm suppressive fire. FN America describes the M240B as a principal suppressive firearm for infantry platoons and companies, chambered in 7.62x51 mm NATO, with a cold hammer-forged barrel, hard-chromed bore, machined-steel receiver, and top-mounted MIL-STD-1913 rail. The broader family includes coaxial, infantry, lightweight, door-gun, and mounted variants, which explains why one designation appears across very different platforms. For readers, the key tradeoff is clear: heavier than lighter squad automatic weapons, but with greater range, penetration, and sustained-fire utility for medium machine gun tasks.

Decades of U.S. and allied service

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The M240 remains in procurement and support pipelines because its service life, reliability, and variant family continue to meet military needs.

FN America's recent contract material shows the M240 still receiving U.S. Army and Navy orders decades after adoption, while its company history ties the platform to long-running U.S. production. That continuity is the operational story. The M240 replaced or supplemented older medium machine guns in many roles and then stayed relevant through variant development, spare-parts support, and barrel production. For HiWars, the page should not treat it as a single infantry weapon only. It is a family of machine guns that links dismounted fire support, armored-vehicle coaxial mounts, helicopter or boat installations, and logistics sustainment across multiple services.

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