ArmaLite AR-10
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The ArmaLite AR-10 is a 7.62×51mm NATO battle rifle designed by Eugene Stoner in the late 1950s and manufactured by ArmaLite. Wikipedia
Action: Gas-operated, rotating bolt (Direct expansion of gas on surfaces of Bolt Carrier)
Designer: Eugene Stoner
Length: 1,050 mm (41.3 in)
Manufacturer: ArmaLite; Artillerie-Inrichtingen (AI); Colt's Manufacturing Company
Muzzle velocity: 820 m/s (2,690 ft/s)
Produced: 1956–present
Rate of fire: 700 rounds/min (fully automatic), variable (semi-automatic)