The Machine Gun

cartridge forward to seat it fully in the chamber and the bolt is then locked in place. The distance through which the cartridge moves is sufficient to cause the projectile and a small portion of the cartridge case neck to enter the barrel as is required to produce the sealing action. After the cartridge is fired and the chamber pressure decreases to a safe operating limit, the bolt is unlocked and moves to the rear to extract the spent cartridge case.

From the preceding description, it is evident that this mechanism combines the functions of both a revolver action and a reciprocating bolt action. The

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