Well, Friedrich von Martini, a Swiss, took the Peabody action and eliminated Peabody's external hammer lock by incorporating the complete firing mechanism within the breechblock
If the springs wear out, closing the breechblock
is no easy task.
Reliability was increased thanks to the redesign of elements of the breech, breechblock
and automatic loading system, while state-of-the-art fire control system and automated navigation system was installed.
After the war, Remington's engineers redesigned the action so the rotating breechblock
was locked in place by an extension of the external hammer as it fell.
The original, Browning, vertical breechblock
moved up-and-down at a 90-degree angle to the end of the breech.
The FCS calculates and transmits time to burst, along with the selected mode of operation, to the round through inductive coils located in the breechblock
of the UBGL.
The design of the super gun called for a solid titanium breechblock
The hammer's mainspring, located at the rear of the frame, rotates the hammer forward to strike the spring-loaded firing pin in the slide's breechblock
and drive it forward to hit the primer.
It requires just the tiniest flick of the lever to lower the breechblock
, eject the spent case and carry a new one into the chamber.
After full pressurization, the loader can safely lower the breechblock
It is not connected to the breechblock
carrier like that of the Kalashnikov.
The system incorporates a device to guard against hang-fire; the breechblock
senses the hang-fire and clears the jam within two seconds.
When the cartridge was fired, by means of an external percussion cap, the expanding powder gases compressed the felt wad back against the face of the breechblock
, forming an effective gas seal.
Attached to the forward under-part of the lever was a fore-and-aft sliding breechblock
that incorporated a brass plunger at its front.
of the Starr pivoted away from the end of the barrel as the block was lowered.