Compact MR556A1 with 14.5-inch barrel and folding/collapsing stock. Requires NFA SBR registration. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2012, Germany Weight: 8.2 oz Overall length: 31" Status: Active Military use: Yes Intended use: Tactical / Competition, Military / Defense