The SPP-1 is a specialized four-barrel underwater pistol developed for Soviet Navy combat swimmers. It fires long steel dart-like projectiles that maintain lethality at depths where conventional ammunition is useless. Each barrel is manually cocked and fired, then the entire barrel assembly rotates to the next loaded barrel. A unique Cold War solution to underwater combat. Type: Pistol Action: Single-Action Caliber: 4.5x39mm Capacity: 4 Year introduced: 1971, Soviet Union Weight: 37.7 oz Overall length: 9.84" Status: Discontinued Military use: Yes Intended use: Military, Underwater Combat