European-market civilian HK416 derivative sold as the MR223. Piston-driven, AR-compatible lower with H&K upper. Imported briefly before US civilian market transition to the HK416 branding. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2007, Germany Weight: 7.93 oz Overall length: 35.43" Status: Discontinued Intended use: Tactical, Recreational