barrel extension वाक्य

The proprietary bolt is a three-lug design that locks onto the barrel extension leaving the upper receiver unstressed.
After firing a round, the initial recoil impulse drives the barrel, barrel extension, and bolt to the rear.
Megatron, the Decepticon leader, originally transformed into a realistic Walther P38 pistol with stock and barrel extensions and scope.
It has five interchangeable parts : a barrel extension, flip up sight, dual-mode light beam, stock and main blaster.
The bolt is held in battery by two sliding cylindrical rollers that engage locking recesses in the barrel extension.

The Model 1200 was the first shotgun to utilize a rotary bolt with four locking lugs secured within the barrel extension.
While the bolt and barrel are returning forward, a cartridge-rammer lever, mounted on the barrel extension, pivots forward, loading a fresh cartridge.
As the bolt's locking lugs move past the barrel extension, the cam pin twists into a pocket milled into the upper receiver.
This twisting action follows the groove cut into the carrier and forces the bolt to twist and " lock " into the barrel extension.
The bolt continues pushing the round into the chamber and locks up when the lockring rotates and locks the bolt and barrel extension together.