The designer, Sergei Simonov, began his work with a gas-operated self-loading rifle in 1930. The first prototype was ready in 1931 and appeared promising, and three years later a trial batch of an improved design was made. In 1935, a competition between Simonov's design and a rifle made by Fedor Tokarev was held. The Simonov rifle emerged as a winner and was accepted into service as the AVS-36. The AVS-36 was a gas-operated rifle with a short piston stroke and vertical sliding locking block. It was capable of both automatic and semi-automatic fire. The barrel was equipped with a large muzzle brake to reduce recoil. Ammunition was in a detachable magazine holding 15 rounds. A knife bayonet was issued with the rifle. A sniper version was produced in small amounts with a PE scope. The AVS-36