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Stag2wi .jpg
The AR-15 comes in many sizes and has many options, depending on the manufacturer. The part shown bottom center is the lower receiver with pistol grip and trigger assembly.
TypeSemi-automatic rifle
Place of originUnited States
Service history
In service1958–present
Production history
DesignerEugene Stoner, Jim Sullivan, Bob Fremont
ManufacturerArmaLite, Colt, Bushmaster, Rock River Arms, Stag Arms, DPMS Panther Arms, Smith & Wesson, Ruger, Anderson, Daniels Defense, CMMG, Olympic Arms, DSArms, Palmetto State Armory,[1] Spike's Tactical,[2] and others.
Mass2.27 kg–3.9 kg (5.5–8.5 lb)
Barrel length
  • 24 inches (610 mm)
  • 20 inches (510 mm) (standard)
  • 18 inches (460 mm)
  • 16 inches (410 mm) (civilian standard)[3]
  • 14.5 inches (370 mm) M4 Military Standard
  • 11.5 inches (290 mm)
  • 10 inches (250 mm)
  • 7 inches (180 mm)
  • 6.5 inches (170 mm)

Cartridge5.56×45mm NATO and others; see list of AR platform calibers
ActionDirect impingement or Gas Piston[4] / Via a Rotating bolt
Rate of fireDepends on operator's speed when pulling trigger.[5]
Muzzle velocity975 m/s (3,200 ft/s)[6]
Effective firing range400–600 m (avg 547 yd)[7][8]
Feed systemVarious STANAG magazines. 5–100-round capacity[9][10]
SightsAdjustable front and rear iron sights

The AR-15 is a semi-automatic rifle made by ArmaLite in 1958 by Eugene Stoner. It is the civilian version of the M-16 ("M" standing for "Military"). AR is the two letter abbreviation for the company that first manufactured the weapon, "ArmaLite" and "Rifle," ArmaLite Rifle (AR). The military version, is the M-16, manufactured by Colt Firearms. The M-16, unlike the AR-15 is a fully automatic, magazine fed, gas operated, shoulder fired assault rifle. The M-16 first saw combat in the Vietnam War. The AR-15 is a lightweight, intermediate cartridge magazine-fed, air-cooled rifle with a rotating lock bolt, actuated by direct impingement gas operation or long/short stroke piston operation. It has been produced in many different versions, including numerous semi-automatic and select fire variants. It is manufactured with extensive use of aluminum alloys and synthetic materials.

Related pages[change | change source]

References[change | change source]

  1. "Ammunition, AR15 Parts, Magazines, Bulk Ammo - Palmetto State Armory".
  2. The Zen Cart Team; et al. "Spikes Tactical".
  3. "Barreled Upper Assemblies - AR-15".
  4. "Carbine Length Piston Kit - XLP".
  5. 30 Caliber Magazine Clip in a Half Second! (With the world's FASTEST shooter, Jerry Miculek). YouTube. February 6, 2014.
  6. "Armalite AR-15". Retrieved July 16, 2008.
  7. "ARMALITE AR-15". Retrieved July 16, 2008.
  8. "Colt Model AR6721". Retrieved July 16, 2008.
  9. "AR-Stoner Mag AR-15 223 Remington Anti Tilt Follower SS". MidwayUSA.
  10. "SureFire".