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

A firearm stock that can be folded or collapsed to reduce overall length for storage or transport.

Adjustable metal aiming devices on firearms, consisting of a front post and rear notch, used without magnification.

Firearm mechanism where a manually operated lever below the receiver cycles the action, extracting and ejecting a spent cartridge and loading a new one.

Select fire is a fire selector mechanism on a firearm that lets the shooter choose the firing mode, such as semi‑automatic, burst, or fully automatic.