Auto-Ordnance Corporation · Submachine-Gun · Out Of Production · 1940
| Weight (empty) | 4900 g (172.8 oz) |
| Overall Length | 857 mm (33.74") |
| Barrel Length | 267 mm (10.51") |
| Height | 150 mm (5.91") |
| Width | 60 mm (2.36") |
| Magazine Capacity | 50 rounds |
| Action Type | Blowback |
| Firing Mechanism | Hammer Fired |
| Muzzle Velocity | 280 m/s (919 fps) |
| Muzzle Energy | 585 J (431 ft·lbf) |
| Effective Range | 150 m (164 yd) |
| Frame Material | Steel |
Primary Caliber: .45 ACP
The Thompson M1928A1 is the military-standard variant of John T. Thompson's iconic .45 ACP submachine gun, adopted by the U.S. Army in 1938 and mass-produced from 1940 to 1942 by Auto-Ordnance and Savage Arms to arm American and Allied forces in the opening years of World War II. Evolved from the commercial M1921 and Navy M1928 models, the M1928A1 retained the retractable Blish-lock actuator, finned cooling barrel, Cutts compensator, and top-mounted charging handle that gave the weapon its unmis...
Country of Origin: United States
Designer: John T. Thompson