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|action= [[Direct impingement]] / [[Rotating bolt]] ...d is distinguished from later civilian-model AR-15 rifles marketed by Colt Firearms. Currently, AR-15 is a generic term for a civilian semi-automatic rifle sim

|action= [[Recoil operation|Recoil operated]], [[rotating bolt]] |feed= 10-round detachable box [[Magazine (firearms)|magazine]]

|action= [[Gas-operated reloading|Gas-actuated]], [[rotating bolt]], balanced recoil system |feed= 30-round detachable box [[Magazine (firearms)|magazine]]

|action= [[Gas-Operated|Gas-actuated]], rotating bolt |feed= 30 round [[Magazine (firearms)|magazine]]

|action= [[Gas-operated reloading|Gas-operated]], [[rotating bolt]], BARS system |feed= 30-round detachable box [[Magazine (firearms)|magazine]]

|action= [[Gas-operated]], [[rotating bolt]] ...he development of countless many other types of individual and crew-served firearms. It was one of the first true assault rifles and, due to its durability and

|action= [[Gas-operated reloading|Gas-operated]], [[rotating bolt]] |feed= 30-round or 45-round [[RPK-74]] detachable box [[Magazine (firearms)|magazine]]

|action= [[Gas operated]], [[rotating bolt]] ...in 1959, the AKM is the most ubiquitous variant of the entire AK series of firearms and it has found widespread use with most member states of the former Warsa

|action= [[Gas-operated reloading|Gas-operated]], [[rotating bolt]] ... Fairchild in 1954, specifically to bring new materials and designs to the firearms industry. Later that year they were joined by [[Eugene Stoner]], a talented

...nergy created by combustion in the chamber and bore acting directly on the bolt face through the cartridge. Other operating systems are [[recoil operation] ... left the barrel and gas pressure drops to a safe level; the weight of the bolt and spring pressure ensure this. To remain practical, this system is only s

[[Image:openboltcropped.jpg|270px|thumb|right|Half-opened bolt on a [[Winchester Model 70]].]] ...closed. Bolt action firearms are most often [[rifle]]s, but there are some bolt-action [[shotgun]]s as well. Examples of this system date back to the 19th

...breech-loading (though [[mortar]]s are generally all muzzle-loaded). Early firearms were almost entirely muzzle-loading. The main advantage of breech-loading ...needle gun]], was a single-shot breech-loader [[rifle]] using a [[rotating bolt]] to seal the breech. It was so called because of its .5-inch needle-like f

...by the power of the cartridge in automatic weapons. Some variations of non rotating breechblocks include: *Rotating crank ([[Kammerlader]])