RIFLE: BUSHMASTER FIREARMS MODEL XM15-E2S, SERIAL NUMBER ARB08901, BLACK (MATTE), CASE NOT INCLUDED, SEMI - AUTOMATIC, 5.56 NATO, 16 Notes: Bushmaster Firearms XM15-E2S Rifle - 5.56 NATO This firearm is identified as a Bushmaster Firearms Model XM15-E2S rifle chambered in 5.56 NATO. It features a semi-automatic action, a 16-inch barrel, and a matte black finish. A case is not included. Item Specifications Manufacturer: Bushmaster Firearms Model: XM15-E2S Type: Rifle Action: Semi-automatic Caliber: 5.56 NATO Barrel length: 16 inches Finish: Black, matte Case: Not included Condition: Good