M240 machine gun

M240 machine gun. The M240 is a family of belt-fed 7.62×51mm NATO general-purpose machine guns derived from the FN MAG and manufactured by FN Herstal. Adopted by the United States Armed Forces in the late 1970s, it has served as a primary squad automatic weapon and vehicle-mounted weapon across multiple branches. Renowned for its reliability and durability, the M240 has seen extensive combat use in conflicts from the Gulf War to the War in Afghanistan (2001–2021).

Overview

The M240 entered United States Army service as a co-axial tank weapon, replacing older models like the M73 machine gun. Its adoption by the United States Marine Corps and subsequent infantry variants solidified its role as a key sustained fire weapon. The system's lineage traces directly to the FN MAG, designed by Ernest Vervier for Fabrique Nationale de Herstal in Belgium. Primary production for U.S. forces has been handled by FN America, a subsidiary operating in South Carolina.

Design and features

The M240 operates on a gas-operated, open bolt system with a rising bolt lock mechanism, ensuring reliable function in adverse conditions. It fires from a disintegrating belt using M13 links and typically employs a quick-change barrel system to manage heat during sustained fire. Standard variants feature pistol grip controls and are mounted on the M192 Lightweight Ground Mount or M122 tripod. The receiver is constructed from milled steel, contributing to its significant weight but legendary durability under the Extreme Test Conditions protocol of the United States Marine Corps.

Variants

The initial model, the M240, was used primarily on the M60 Patton and M1 Abrams series of main battle tanks. The M240B, adopted after the Advanced Combat Rifle trials, became the standard infantry model for the United States Army. The M240G was the counterpart for the United States Marine Corps, later succeeded by the lighter M240L developed with United States Special Operations Command. Vehicle-specific versions include the M240C for internal mounting and the M240D for helicopter door gunner use. The M240E6 and subsequent M240H represent further weight-reduction and universal mount efforts.

Operational history

The M240 first saw major combat during the Gulf War mounted on M2 Bradley vehicles and Humvees. Its use expanded dramatically in the Iraq War and War in Afghanistan (2001–2021), where its range and stopping power were valued in the mountainous terrain of Kunar Province and urban fights in Fallujah. The weapon was deployed by the 101st Airborne Division and 10th Mountain Division during Operation Enduring Freedom. It has also been used by coalition partners like the British Army and the Australian Defence Force in various international engagements.

Users

The primary user is the United States Department of Defense, across all service branches including the United States Coast Guard. It is a standard weapon in NATO and allied nations, with notable operators being the Canadian Armed Forces (designated C6), the Australian Army, and the French Army. Other users include the Japanese Ground Self-Defense Force, the South Korean Army, and the Taiwanese Army. The weapon has been exported to numerous countries in South America and the Middle East through Foreign Military Sales programs.

Category:Machine guns Category:7.62 mm firearms Category:Infantry weapons of the United States