{"product_id":"aero-ar15-5-56-pro-series-bcg-ntrd","title":"Aero Precision AR-15 5.56 Pro Series BCG Nitrided – M16 Profile Bolt Carrier Group","description":"\u003cp\u003eThe Aero Precision Pro Series Nitrided Bolt Carrier Group is a complete M16-profile BCG designed for reliable operation in AR-15 rifles chambered in 5.56 NATO or .223 Remington. This is a direct replacement for standard mil-spec BCGs and offers improved surface hardness and corrosion resistance over phosphate finishes. Shooters upgrade to nitrided BCGs for easier cleaning, reduced friction, and long-term durability under high round counts.\u003c\/p\u003e\u003cp\u003eThe carrier and bolt are treated with a nitriding process that hardens the steel throughout rather than applying a surface coating, resulting in a slick, dark finish that resists wear and carbon buildup. Gas key is properly staked per mil-spec. This is a drop-in component for standard AR-15 lower and upper receivers—no gunsmithing required. Includes ejector, extractor, cam pin, and firing pin assembly.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e M16 Profile Bolt Carrier Group\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15 rifles chambered in 5.56 NATO \/ .223 Remington\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel (carrier and bolt)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Nitrided (QPQ)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-In\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt carrier, bolt assembly, cam pin, firing pin, ejector, extractor, gas key (staked)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Aero Precision","offers":[{"title":"Default Title","offer_id":47944020689151,"sku":"APRH101767C","price":185.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2854664.jpg?v=1766612898","url":"https:\/\/doublestackstore.com\/products\/aero-ar15-5-56-pro-series-bcg-ntrd","provider":"Double Stack Store","version":"1.0","type":"link"}