The M2 Carbine would remain in U.S. military service into the 1960s, even as the Army adopted the large M14 battle rifle and then the iconic M16 assault rifle still in use today.

The M2 Carbine was developed to use a fully cylindrical bolt, where the M1 and M1A1 originally had a flat-topped bolt. The newer round bolts work in an M1 Carbine, ... The .30 carbine typically fires ...

The M2 Carbine would remain in U.S. military service into the 1960s, even as the Army adopted the large M14 battle rifle and then the iconic M16 assault rifle still in use today.

The M2 carbine retrofitted with the modified M1 or M2 infrared night-vision sights with the attached separate mounting bar was standardized as the “Carbine, Caliber .30, M3.” ...

The M2 Carbine was developed to use a fully cylindrical bolt, ... The .30 carbine typically fires a 110-grain FMJ bullet at about 1,900 fps — not exactly lighting in a bottle.