What is an assemblage of components required to function a weapon once, such as gun ammunition?

The assemblage of components required to function a weapon once, such as gun ammunition, is best described as a cartridge. A cartridge typically consists of several integrated parts: the projectile (bullet), the casing (which holds the other components), the gunpowder (which serves as the propellant), and the primer (which ignites the gunpowder). When the cartridge is fired, the explosion created by the ignited gunpowder propels the bullet out of the barrel of the weapon.

In contrast, while a magazine and a clip may both relate to ammunition loading and storage, they do not represent the individual unit that is fired. A magazine is a device that holds multiple cartridges and feeds them into the firearm, whereas a clip is a device that can hold multiple cartridges together for ease of loading into the magazine. A package typically refers to the container in which ammunition is sold or stored, rather than the functional unit used in the operation of a weapon. Thus, the cartridge is the most accurate term for the complete assembly that enables a single function of the weapon.