The Spasov M1944 Trigun was a triple barrel submachine gun of Bulgarian origin, and a rare variation of the Spasov M1944. It was chambered in the 9x19mm round and had a very high rate of fire, at 1500 to 3000 rounds per minute. An example can be seen at the Sofia military museum today.
The M1944 Trigun is a 9x19mm calibre, blowback operated, triple barrel submachine gun that uses three separate 30-round magazines for each barrel. The outer barrels have shrouds while the central barrel has a compensator. The weapon has a stock and foregrip behind the magazine area.