Spring Piston Guns

Some articles on spring, guns, gun, piston:

Air Gun Power Sources - Spring-piston
... Spring-piston air guns are able to achieve muzzle velocities near or greater than the speed of sound from a single stroke of a cocking lever or the barrel itself ... The difficulty of the cocking stroke is usually related to the power of the gun, with higher muzzle velocities requiring greater effort ... Spring-piston guns operate by means of a coiled steel spring-loaded piston contained within a compression chamber, and separate from the barrel ...

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