Original civilian AR-15, direct derivation of the military M16 before A2 improvements. Triangular handguard, birdcage flash hider. Type: Rifle Action: Semi-Automatic Caliber: .223 Rem Capacity: 20 Year introduced: 1963, USA Weight: 6.35 oz Overall length: 38.5" Status: Discontinued Intended use: Sport, Collecting, Historical