A bolt action is a type of firearm action that requires the user to manually cycle the bolt to load and eject cartridges. It is uncommon in pistols.

Firearm configuration where the action and magazine are located behind the trigger, reducing overall length while maintaining barrel length.

A firearm feed system where ammunition is stored in a separate container (magazine) that can be removed and replaced, enabling rapid reloading.

A mounting system for attaching optical sights to rifles.