PKM locking system uses which mechanism?

PKM locking system uses which mechanism?

• A. Tilting Bolt
• B. Rolling Lock
• C. Rotating Bolt
• D. Lever Lock

Answer: (C)

The PKM uses a rotating bolt locking mechanism. In this design, the bolt carries locking lugs that engage matching recesses in the receiver. When fired, gas pressure drives the bolt carrier rearward, and cam surfaces on the bolt carrier rotate the bolt to unlock it. Once unlocked, the bolt continues rearward to extract and eject the spent case, then return forward to chamber a new round. This rotating motion provides a strong and reliable lock for high-pressure, sustained-fire operation. Compared to tilting, rolling, or lever locking, the PKM’s action relies on the bolt rotating to lock and unlock rather than tilting a block, rolling locking components, or a separate locking lever.

The PKM uses a rotating bolt locking mechanism. In this design, the bolt carries locking lugs that engage matching recesses in the receiver. When fired, gas pressure drives the bolt carrier rearward, and cam surfaces on the bolt carrier rotate the bolt to unlock it. Once unlocked, the bolt continues rearward to extract and eject the spent case, then return forward to chamber a new round. This rotating motion provides a strong and reliable lock for high-pressure, sustained-fire operation.

Compared to tilting, rolling, or lever locking, the PKM’s action relies on the bolt rotating to lock and unlock rather than tilting a block, rolling locking components, or a separate locking lever.