Understanding Firearm Bolt Parts

The bolt is the part of a firearm that turns to load and eject the weapon's chamber. The action of the bolt is either manual, requiring manual operation by the user and an additional round (such as in break-action firearms), or else bolt action, which uses manual operation but has a mechanism that automatically loads and ejects rounds as fast as the operator can cycle them into position. If you are looking for bolt parts, visit Mountain Tactical.


A bolt is a type of fastener that is typically used to hold two or more pieces of material together. Bolts are usually made from metal, but can also be made from other materials such as plastic or wood. The head of the bolt is typically round or hexagonal in shape, and the shank of the bolt is threaded so that it can be screwed into place. Bolts are typically tightened using a wrench, but can also be tightened by hand.

There are three main types of firearm bolts: 

  • single shot

  • lever

  • pump

Each type has its own unique function and purpose. 

Single-shot bolts are the most basic type of bolt. They are typically found on older firearms, or on very simple designs. Lever bolts are a bit more complex and are often found on rifles. They use a handle to cock the hammer and release the firing pin. Pump bolts are the most complex type of bolt and are typically found on shotguns. They use a pump-action to chamber rounds and cock the hammer.