Closed boltA semi or full-automatic firearm which is said to fire from a closed bolt is one where, when ready to fire, a round is in the chamber and the bolt and working parts are forward. When the trigger is pulled, the firing pin or striker fires the round; the action is cycled by the energy of the shot, sending the bolt to the rear, which extracts and ejects the empty cartridge case; and the bolt goes forward, feeding a fresh round from the magazine into the chamber, ready for the next shot.
Rifle cartridgeA rifle cartridge is a firearm cartridge primarily designed and intended for use in a rifle/carbine, or machine gun. Fully powered cartridge A full-powered cartridge is a rifle cartridge used interchangeably between service rifles, sniper rifles, and general purpose machine guns. It is a retronym for rifle cartridges used prior to and during World War II. They are primarily used today in general purpose machine guns, designated marksman rifles, and sniper rifles.
L2A3vignette|Le pistolet-mitrailleur Sterling avec sa crosse dépliée Le pistolet-mitrailleur Sterling a été breveté sous sa forme initiale en 1942 par George W Patchett (en). Sa version la plus courante, le L2A3, fut adoptée en 1956 par l’Armée britannique en remplacement de la Sten. Ce pistolet-mitrailleur est fabriqué entièrement en acier (canon et mécanisme) et en tôle emboutie. Il possède une crosse repliable (par le dessous), une poignée pistolet et un manchon perforé. Il fonctionne avec une culasse non calée à masse percutante.
