Knights Armament SR-15 E3 Mod2 in 11.5-inch barrel SBR configuration. URX 4 M-LOK handguard. E3 bolt. Special operations compact configuration. Type: Rifle Action: Semi-Auto Caliber: 5.56 NATO Capacity: 30 Year introduced: 2016, USA Weight: 60 oz Overall length: 27" Status: Active Intended use: CQB, Defense, Duty