Brand: Bushmaster Model: XM15-E2S Caliber/Gauge: 5.56 NATO Finish: Black Stock: Bushmaster collapsible CAR style Barrel: 18 inch with A2 muzzle device Additional: Bushmaster XM15-E2S chambered for 5.56 NATO. Featuring covered quad rail handguard, fixed front sight gas block, and Vortex Sparc optic. The barrel is in good condition with sharp and clear riflings and bore. Handling wear is clear, but superficial.