The all new AR-556 MPR (Multi-Purpose Rifle) features an eighteen inch nitrided alloy steel barrel with rifle-length gas system, a 15 inch M-LOK free float handguard, the two-stage Ruger Elite 452 AR-Trigger. Magpul MOE grip and MOE SL collapsible buttstock on a mil-spec buffer tube. Flattop upper is constructed from aerospace-grade 7075-T6 aluminum; includes forward assist, dustcover and brass deflector. Type III hard coat anodized finish. Ruger muzzle brake with a radial port design. Threaded at 1/2-28 tpi. Includes one 30-round Magpul PMAG.