Robinson Armament XCR-L, modular semi-auto in 5.56 NATO with 16-inch barrel. Long-stroke gas piston with ambidextrous design. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2006, USA Weight: 7.8 oz Overall length: 35" Status: Active Intended use: Tactical, Modular