A magazine is the storage unit and feeding method for ammunition and derives its name from the magazines of old where ammo was stored by armies. Magazines range from the detachable, which are the standard feeding modes and prerequisites of an assault rifle (and which are sometimes incorrectly referred to as clips which is derived from stripper clips of bolt action rifles. However, most magazines are charged with clips, to speed the reloading). It must be noted belt-fed weapons do NOT use magazines; the belt may be contained in an ammo box.
Gravity Fed Magazines (Hopper)Edit
Usually refers to a top mounted, gravity fed magazine. These were used in manually operated weapons such as Gatling Guns, Nordenfelt Guns, Gardner and Bira machine guns. Hopper magazines are somewhat still in use with heavier applications such as anti aircraft artillery etc.
Detachable magazines come in various shapes, sizes, capacities and stacking styles. Capacities can range anywhere from 3-100+ rounds depending on the ammunition and magazine type. Types of magazines include Drum, Box, Casket and snail drum and the stacking styles in each of these can vary from single stack to triple stack (a recent innovation).
Usually found in bolt action service rifles often fed with charger clips.
Detachable and quick loading, used on most firearms.
A widened box magazine that holds more rounds like a drum magazine but less bulky and complicated.