A breech mechanism in artillery where the breechblock slides vertically downward to open or close the breech.

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

Rimfire: a type of ammunition in which the primer is located in the rim of the cartridge case and is ignited by the firing pin striking the rim.

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