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The AR-15 is the semiautomatic version of the M16 series of assault rifles, designed by the great designer Eugene Stoner, and it is most commonly used by the US armed forces. I would get into the history of this gun, but it is very longwinded but thoroughly interesting. AR-15s are usually chambered in 5.56 x 45mm (.223 Remington) caliber and have either 24", 20", 16", or 11.5" barrels and have either collapsible stocks or full stocks and may either have a NATO railed flattop or a carrt handle with an adjustable rear sight. This weapon has been the basis of numerous high-accuracy rifles.
I am so getting an AR-15 when I get my license.
AR15 by Ian R May 16, 2005
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AR-15 stands for "Armalite Rifle", not "Assault rifle" or God forbid "Automatic rifle" because it's the semi-auto civilian version of the M4.
Do you know what AR-15 stands for?
AR-15 by idksomepilot July 18, 2022
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a black plastic hunting rifle hated for being black and cool.
Johnny Spleenburger is the AR-15 champion! He can kill coyotes before he gets attacked by them
AR-15 by CanukGuy May 21, 2020
AR 15 is the civilian version of the military's M4 carbine. Contrary to what most people believe AR doesn't stand for assault rifle, rather it stands for the original manufacturer Armalite Rifle. AR 15 is semiautomatic and does't meet Federal requirements to be classified as an assault rifle.
AR 15 is so legal in Kalifornia, now everyone is sporting it
AR 15 by Nasor6221 July 13, 2015
This gun SJWs claim is the spawn of all evil. Believe it or not, the AR actually is the Father of the M16, and the M16 was developed off it. It is now marketed as a Semi-Auto Rifle for civillians in America. Recently, there has been a Libtarded movement to ban it, following the recent school shootings.
Visitor: Oh, is that your M16?
Gun owner: No, it's an AR 15 man. Have you been playing too much COD recently?
AR 15 by Nein_Definition July 14, 2018
The gun that gets a real bad rep because it is used in almost every mass shooting. Although in reality it is used because it is very common and plentiful in America. The fake news media typically portrays the AR-15 as the "Most deadliest gun ever made" or that it is a "Weapon of War" although in actuality it is a civilian version of the M4A1 that is the REAL weapon of war.
The media acts as if the AR-15 is the only gun in existence.
AR-15 by A Human Male July 21, 2018
AR does NOT stand for Assault Rifle
50 Cent "Wanksta"

"what you know about AKs and AR-15s?"
AR-15 by CubaGT December 14, 2008
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