Ruger, 8511 AR-556, 5.56x45mm NATO, 16.10 inch, 10+1, Hardcoat Anodized

The Ruger 8511 AR-556 CO/MD compliant rifle brings a rugged, user-friendly AR platform to shooters who need a reliable 5.56x45mm NATO semi-auto for range work, home defense, or local competition; its 16.10" heavy contour cold hammer-forged barrel with a 1:8" twist and M4 feed ramps delivers long service life and consistent accuracy with 35—77 gr bullets while the Type III hard coat anodized 7075-T6 upper and black hardcoat finish resist corrosion and wear. You get the tactile Ruger Rapid Deploy folding rear sight mated to an elevation-adjustable A2-style front post for instant iron-sight co-witnessing or quick optic installation, a chrome-plated, shot-peened 9310 bolt and chrome-lined gas key for durability under sustained firing, and a patent-pending barrel nut/delta ring system that allows one-person handguard removal and accepts most carbine-length rails. The six-position collapsible M4-style stock and extended-reach ergonomic polymer grip make the 8511 comfortable for different shooters and kit, while the mil-spec buffer tube, milled carbine gas block with QD socket and bayonet lug, glass-filled nylon handguards, single-stage trigger and enlarged trigger guard round out a platform that meets state compliance without sacrificing core AR performance or reliability.