The Thompson submachine gun and the M3 submachine gun, two classic submachine guns (SMGs), helped American GIs win World War II. Both fired the same powerful and ever-beloved .45 ACP (Automatic ...

M1A1 Thompson submachine gun, M1928A1 Thompson, Pistol Caliber Carbine, Tommy Guns, .45 ACP, Auto-Ordnance, Kahr Arms, New For 2025, New Guns 2025, Jeremiah Knupp, Auto-Ordnance 1927A-1C  ...

But a more storied use of the “Tommy gun,” as it was dubbed, was employed by minions of Capone, the nattily dressed king of the Chicago underworld in the 1920s and ’30s.