What is ArmaLite AR-15?
{{Infobox weapon | is_ranged = yes | name = AR-15 | image = Stag2wi .jpg | caption = The AR-15 comes in many sizes and has many options, depending on the manufacturer. The part shown bottom center is the lower [[Receiver (firearms)|receiver]] with pistol grip and trigger assembly. | origin = United States | type = [[Semi-automatic rifle]] | designer = [[Eugene Stoner]], [[L. James Sullivan|Jim Sullivan]], Bob Fremont | manufacturer = [[ArmaLite]], [[Colt's Manufacturing Company|Colt]], [[Bushmaster Firearms International|Bushmaster]], [[Rock River Arms]], [[Stag Arms]], [[DPMS Panther Arms]], [[Smith & Wesson]], [[Ruger]], [[Anderson]], [[Daniels Defense]], [[CMMG]], [[Olympic Arms]], DSArms, Spike's Tactical,<ref>{{cite web|url=http://www.spikestactical.com/|title=Spikes Tactical|author=The Zen Cart Team|work=spikestactical.com|display-authors=etal}}</ref> and others. | design_date = 1957 | service = 1958–present | cartridge = [[5.56×45mm NATO]] and others; see [[list of AR platform calibers]] | action = [[Direct impingement]] or Gas Piston<ref>{{cite web|url=http://www.adamsarms.net/carbine-length-piston-kit-xlp|title=Carbine Length Piston Kit - XLP|work=adamsarms.net|access-date=2016-05-29|archive-date=2015-04-28|archive-url=https://web.archive.org/web/20150428034849/http://www.adamsarms.net/carbine-length-piston-kit-xlp|url-status=dead}}</ref> / Via a [[Rotating bolt]] | rate = Depends on operator's speed when pulling trigger.<ref>{{cite AV media|url=https://www.youtube.com/watch?v=REdjjLBaiOs|title=30 Caliber Magazine Clip in a Half Second! (With the world's FASTEST shooter, Jerry Miculek)|date=February 6, 2014|work=YouTube}}</ref> | velocity = 975 m/s (3,200&nbsp;ft/s)<ref>{{cite web|url=http://www.probertencyclopaedia.com/cgi-bin/res.pl?keyword=Armalite+AR-15&offset=0|title=Armalite AR-15|access-date=July 16, 2008|archive-date=August 8, 2012|archive-url=https://www.webcitation.org/69kjb1E0v?url=http://www.probertencyclopaedia.com/cgi-bin/res.pl?keyword=Armalite+AR-15|url-status=dead}}</ref> | range = 400–6