Last week we did a name this gun post and here is the answer. SPECSCalibers:5.56 NATO (.223 Rem.), 6.8 SPC, 7.62x39mm, 5.45x39mm, .300-221Action: Semi-auto, gas-operated long-stroke piston/ Rotating boltOverall Length: 18″ Weight Empty: 5.2 lbs.Barrel… Robinson Armament XCR-L Pistol