He heard a heavy, muffled thump as the locked bolt inside with-drew.

Before firing, the bolt body is separated from the locked bolt head by a stiff spring.

As the shotgun recoils after firing, inertia causes the bolt body to remain stationary while the recoiling gun and locked bolt head move rearward.

It features a roller locked bolt mechanism that consists of the bolt head, a pair of rollers, the striker sleeve, bolt body and return spring.

The idea is that the energy from the recoil is used, in lieu of a locked bolt or a lever mechanism, to eject each spent cartridge and insert the next one.

"Yet," she continued definitely, "if this person possessed that which was essential to Wong Ts'in's prosperity, and Wong Ts'in held that which was necessary for this one's tranquillity, a locked bolt would be upon the one until the other was pledged in return."

The locked breech design was selected for further development and testing.

It used blowback rather than a locked breech and proved unsuccessful, with only around 1,000 made.

This method of operation also allows the use of standard and higher power 9x18mm ammunition without using a locked breech action.

They had already completed their loading procedures with both projectile and powder bags in place behind locked breeches.

The SR9 is recoil operated with a locked breech.

The GSh-18 is a short recoil-operated, locked breech pistol.

The Roth-Steyr pistol fires from an unusual style of locked breech.

The Semmerling fires from a static, fully locked breech, producing considerable recoil.

The Sa 23 series utilize a straightforward blowback action, with no locked breech, and fire from the open bolt position.

He swore through clenched teeth as he tugged at the solidly locked breech but could not find a way to free it.

The standard model features a stainless steel construction, locked breech, passive striker block and no magazine disconnect.

The Ultimax 100 is a locked breech weapon with a rotating bolt that contains 7 locking lugs.

The A-100 is a recoil-operated, locked breech design with improved Browning-style linkless locking.

Self-loading automatic pistols can be divided into "blowback" and "locked breech" categories according to their principle of operation.

A few locked breech designs use a form of blowback (example: primer actuation) to perform the unlocking function.

When a round is fired, residual energy from the propellant charge in the cartridge acts upon the safely locked breech and bolt carrier.

M57 pistol is short recoil operated, locked breech pistol that uses browning type action with swinging link.

The MG 51 is a short-recoil-operated, locked breech, air-cooled and automatic only, belt-fed weapon.

Because of a lower bore axis, lighter slide, and locked breech, the Remington 53 boasted much less felt recoil than the M1911.

The P220 operates by the locked breech short-recoil method pioneered by John Browning.

Self-loading pistol, original design with Browning 1935-type locked breech, in 9 mm Parabellum with double column 13-round magazine.

The USP is a semi-automatic pistol with a mechanically locked breech using the short recoil method of operation.

By late 1917, the limits of the Blish Principle were discovered: rather than working as a locked breech, it functioned as a friction-delayed blowback action.

Self-loading pistol, original design with Beretta falling-block type locked breech, in 9 mm parabellum with double-stack 15-round magazine.

This is a locked breech, gas-operated action which is very similar in its mechanical principles to the future US M1 Garand.