Which locking system is used by the M500 shotgun?

Which locking system is used by the M500 shotgun?

• A. Rotating bolt
• B. Gas piston
• C. Lever lock
• D. Sliding block

Answer: (D)

In this shotgun, the breech is secured by a sliding locking block rather than a rotating bolt. The locking block moves into position as the action closes, locking the bolt and barrel together so the chamber can withstand the high pressure when fired. When you cycle the action, the block slides out of engagement and allows the bolt to move back for the next round. This sliding-block design is rugged and well-suited to the pump-action platform, providing reliable lockup without the bolt having to rotate. Rotating bolts would require the bolt head to twist to lock, which isn’t how this system operates. A gas piston is used in gas-operated semi-automatics, not in a pump-action design. A lever lock isn’t the mechanism used here either.

In this shotgun, the breech is secured by a sliding locking block rather than a rotating bolt. The locking block moves into position as the action closes, locking the bolt and barrel together so the chamber can withstand the high pressure when fired. When you cycle the action, the block slides out of engagement and allows the bolt to move back for the next round. This sliding-block design is rugged and well-suited to the pump-action platform, providing reliable lockup without the bolt having to rotate.

Rotating bolts would require the bolt head to twist to lock, which isn’t how this system operates. A gas piston is used in gas-operated semi-automatics, not in a pump-action design. A lever lock isn’t the mechanism used here either.