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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.
Type Semi-automatic rifle
Place of origin United States
Service history
In service 1958–present
Production history
Designer Eugene Stoner, Jim Sullivan, Bob Fremont
Designed 1957
Manufacturer ArmaLite, 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.
Weight 2.27 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)

Cartridge 5.56×45mm NATO and others; see list of AR platform calibers
Action Direct impingement or Gas Piston[4] / Via a Rotating bolt
Rate of fire Depends on operator's speed when pulling trigger.[5]
Muzzle velocity 975 m/s (3,200 ft/s)[6]
Effective range 400–600 m (avg 547 yd)[7][8]
Feed system Various STANAG magazines. 5–100-round capacity[9][10]
Sights Adjustable front and rear iron sights

The AR-15 is a semi-automatic rifle made by ArmaLite in 1958 by Eugene Stoner. It was used in the Vietnam War, and today is a civilian version of the M-16. 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]

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