The rifle Pierre refers to is the U.S. Rifle, Cal .30 M1E5. This was a shortened version of the M1 rifle, with a folding stock and with the barrel shortened to 457mm (18"); The accuracy was unimpared but the flash and muzzle blast were escessive.
I noticed that the description, from Military Small Arms, 20th Century, states it came with a folding stock. Having been a tanker way back when the Army had the M48 tank, the rifle we had was a U.S. Cal .30 Carbine, and as long as I was in the service and even as a Weapons Specialist, I never saw a Tankers Model M1.
I have recearched the Tanker Model, however, find no trace of issue to the field. I sometimes wonder when these rifles were mfg'd commercially because my dad, rest his soul, had one he purchased back in the 1960's.
HJN