Wilson Combat AR-15 Bolt Carrier Assembly Features The Wilson Combat AR-15 Bolt Carrier Assembly is machined from aerospace-grade 9310 tool steel for exceptional toughness paired with a hardened 8620 steel carrier that resists wear under repeated cycling. Forward assist cuts are machined into the carrier for added reliability when extra force is needed to seat the bolt. The gas key is properly staked during final inspection a detail that keeps it from backing out or failing at a critical moment. The machined ejector and extractor are built to the same specification Wilson Combat uses on its own fully-built rifles so the same dependable parts that back their custom guns are available as a direct replacement or spare. The polished nickel boron coating covers the carrier for easy cleanup and strong corrosion resistance keeping the action running smoothly between cleanings. This assembly is a drop-in fit for any quality 5.56 case head based AR rifle including 5.56 NATO .223 Remington .300 Blackout and similar chamberings sharing the same bolt face. Every experienced AR owner knows a spare complete bolt carrier assembly is the single most valuable spare parts purchase for keeping a rifle running. Backed by Wilson Combat s reputation for Mil-Spec quality this bolt carrier assembly is for sale at GrabAGun for shooters who want proven reliability in reserve. Wilson Combat AR-15 Bolt Carrier Assembly Specifications Manufacturer: Wilson Combat Model: AR-15 Bolt Carrier Assembly Caliber: 5.56 NATO Compatible Hosts: AR-15 Material: Stainless Steel Finish: Nickel Boron Carrier Type: M16 Available At: GrabAGun