Model Variants (Including Prototypes)
FN MAG - Original Belgian Fabrique Nationale forming the basis of the American M240.
M240 - Official Series Designation differing in only production methods for the United States factories when compared to the FN design; initial models mounted on M60 Patton and M1 Abrams series tanks as coaxial weapons.
M240B - Standard US Army Designation beginning in 1995.
M240B Weight Reduction Program - Program seeking to lighten the weight of M240B models through manufacturing technique and selective materials.
M240C - Feeding system switched from left to right side for use in M2/M3 Bradley infantry vehicle co-axial machine gun mounts.
M240D - Based on the M240E1; can be utilized in air- or ground-based roles.
M240G - US Marine Corps converted M240 systems mounted on M122E1 tripod or bipod; offered in 1994; "universal" M240 system for USMC vehicle, tank, infantry and aircraft roles.
M240H - Improved M240D models; rail-equipped feed cover; revised flash suppressor.
M240E1 - Becoming the M240D production model.
M240E4 - US Army trials designation for M240B.
M240E5 - Becoming the M240B Weight Reduction Program model.