Breechblock

A breechblock is a mechanical component found in firearms, specifically in the breech-loading mechanism. It is a movable part that closes and seals the rear end of the firearm's barrel, where the cartridge or projectile is loaded. The breechblock is designed to withstand the pressure generated by the firing of the cartridge and prevent any gas or debris from escaping backward. It also facilitates the extraction of the spent cartridge casing and the loading of a new cartridge into the chamber. Breechblocks can vary in design and operation depending on the type of firearm, but their primary function is to ensure the safe and efficient operation of the firearm's breech-loading system.