[m21sniper]

No, no US rifle or MG has used US M1 .30cal (essentially low powered .30-06) since the M-1 Garand and M-1919 were retired.

The M-1 Garand was replaced in the mid 60s by the M-14 7.62x51mm (.308 Win), the 03 Springfield Sniper Rifle was replaced by the M-1D in the 50s, and then the M-1D was replaced by the M-21 in the same time frame as the M-14 replaced the M-1.

The M1919 and the BAR were replaced by the M-60.

The M-1 Carbine was completely out of service by the early 70s and was never replaced until the M-4 rolled around in 95.

The last WWII compatible cartridge held over (besides the M-2 .50cal BMG) was the M1911A1 chambered for .45ACP, which was phased out in the mid-late 80s. I imagine that by about 95 at the latest they were completely phased out of service in every guard and reserve unit as well. We got our M9 Beretta 9mm's at my unit in 1988.

Actually the M-1 Grease Gun remained in service with many tanker units until the introduction of the M-4, so some of those might have remained in service until about the 2000 time frame...maybe. Our tankers still had M-1 Grease guns when i ETS'd.

The M-2 HMG/BMG is still in service today.