M15 Automatic Rifle (aka T44E5): Adopted But Not Produced

When the US replaced the M1 Garand, the plan was to adopt both a select-fire infantry rifle and a heavy-barreled support weapon on the same platform. During development, both the T44 (later M14) and T48 (FAL) rifles had heavy-barreled versions. In the case of the M14, the final iteration of the heavy-barreled weapon was the T44E5, which was formally adopted as the M15. Before it could be actually put into production, though, it was cancelled as unnecessary.

In testing, first the Marines Corps and then the Infantry Board found that fitting a standard M14 with a detachable bipod gave the same performance as the M15 – and so why bother with an extra version of the gun? Of course, the equal performance was really quite poor compared to proper light machine guns, and once the M14 got into service this shortcoming was noticed. this led to the M14A1 aka M14E2 project, to essentially recreate the M15 with a pistol grip stock and front grip.

Thanks to the Springfield Armory National Historic Site for giving me access to this truly unique specimen from their reference collection to film for you! Don’t miss the chance to visit the museum there if you have a day free in Springfield, Massachusetts:
https://www.nps.gov/spar/index.htm