Breech Bolt

A breech bolt is a component of a firearm that is responsible for closing and sealing the rear end, or breech, of the gun's barrel. It is typically a cylindrical or rectangular metal piece that slides or rotates to lock the breech and prevent the escape of gases when the firearm is fired.

The breech bolt is an essential part of the firearm's action, which is the mechanism that loads, fires, and ejects cartridges or shells. When the gun is fired, the breech bolt moves forward to close the breech, ensuring that the cartridge is securely in place. This action also seals the breech, preventing the escape of hot gases and directing them forward to propel the projectile out of the barrel.

After firing, the breech bolt unlocks and moves backward, allowing for the extraction of the spent cartridge case and the loading of a new round. The design and operation of breech bolts can vary depending on the type of firearm, such as bolt-action rifles, semi-automatic pistols, or shotguns.

Overall, the breech bolt plays a crucial role in the safe and effective operation of firearms by ensuring proper chambering, sealing the breech, and facilitating the cycling of ammunition.