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  ...

The design by General John J. Thompson was complicated yet reliable. It utilized the Blish Lock to delay the opening of the bolt when fired which made the M1928 Thompson a delayed blowback firearm.