The M3A1 is a open bolt SMG used after the end of WWII to replace the M1 Thompson. Chambered in .45 ACP, this SMG was the MP40 of American troops. Affectionately name the "Grease Gun", simply because it looked like it was the mechanic's grease gun.
m3a1
grease
guns
45acp
wwii
submachinegun
magazine
ammo
bullets
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