Also known as: СПП-1, СПП-1М, SPP1, SPP-1M
The SPP-1 (СПП, Специальный Пистолет Подводный "Special Underwater Pistol") A Soviet double-action Handgun designed in late 1960s, intended for frogmen use. It fires 4.5×40mmR cartridge that has a 115 mm long steel Dart. The Weapon has four smoothbore barrel that is hinged to the frame, and a huge rounded trigger guard. Reloading is similar to any break-action firearm, with a clip.
SPP-1M is the improved variant.