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.

A mounting system for attaching optical sights to rifles.

Firearm mechanism where a sliding fore-end (foregrip) is moved back and forth to eject spent casings and chamber a new round.

A straight, cylindrical ammunition container that feeds cartridges into a firearm's action via gravity or a spring.