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The bolt is the part that feeds the cartridge into the chamber. It houses the firing pin and ejector, and the extractor is attached to the exterior (usually with a pin, so as to allow the extractor to grip the rim of the cartridge case).

It is an integral part of a firearm's operation; without the bolt (or an equivalent), it cannot fire.

Bolt designsEdit

Telescoping boltEdit

A telescoping bolt is a bolt that wraps around the breech end of the barrel. This bolt design is often used to reduce overall weapon length without sacrificing barrel length or bolt weight.

Rotating boltEdit

A rotating bolt is a bolt that locks into a barrel extension via use of lugs. There is always a slot milled out for a cam pin in the bolt carrier in order to facilitate the rotating of the bolt itself as it locks into the barrel extension.

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