Oy Tikkakoski Ab · Submachine-Gun · Discontinued · 1931
| Weight (empty) | 4600 g (162.3 oz) |
| Overall Length | 870 mm (34.25") |
| Barrel Length | 314 mm (12.36") |
| Height | 255 mm (10.04") |
| Width | 55 mm (2.17") |
| Magazine Capacity | 70 rounds |
| Action Type | Blowback |
| Firing Mechanism | Open Bolt |
| Muzzle Velocity | 396 m/s (1299 fps) |
| Muzzle Energy | 584 J (431 ft·lbf) |
| Effective Range | 200 m (219 yd) |
| Frame Material | Steel |
Primary Caliber: 9x19mm Parabellum
The Suomi KP/-31 is a Finnish-designed submachine gun chambered in 9x19mm Parabellum, designed by Aimo Lahti and manufactured by Oy Tikkakoski Ab from 1931. Featuring a machined steel receiver, quick-change barrel, and an iconic 70-round drum magazine, the Suomi is widely regarded as one of the finest submachine guns of the Second World War and the benchmark that other WWII-era designs attempted to match. Its heavily built, milled receiver and lengthy 314mm barrel give it exceptional accuracy an...
Country of Origin: Finland
Designer: Aimo Lahti