Owners of the S&T Mosin-Nagant M1938 bolt action airsoft rifle can check this video from Taiwan Gun on how to disassemble it for maintenance. The Mosin-Nagant model m1938 is a historical Russian repeating airsoft gun rifle manufactured by ST Armament. It was introduced to the artillery, rear and auxiliary formations and is recognizable by its shortened barrel. The rifle has a realistic ASG spring bolt-action mechanism and an adjustable hop-up system. It is solidly made with a handguard and stock of high-quality natural wood and metal alloys for other parts. The receiver has original markings for added realism.