{"product_id":"fail-zero-5-56mm-nato-bolt-carrier-group-ar-15-m16-black-nitride-full-auto","title":"Fail Zero 5.56mm NATO Bolt Carrier Group AR-15\/M16 - Black Nitride Full Auto","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eFail Zero 5.56mm Bolt Carrier Group\u003c\/span\u003e\u003c\/strong\u003e is a fully assembled, drop-in carrier designed for \u003cstrong\u003emil-spec AR-15, M4, and M16\u003c\/strong\u003e upper receivers. Machined from \u003cstrong\u003e8620 steel\u003c\/strong\u003e and finished in \u003cstrong\u003eBlack Nitride\u003c\/strong\u003e, the carrier ships complete with a matching \u003cstrong\u003e5.56\/.223 bolt and extractor\u003c\/strong\u003e and is ready to install into any standard platform upper.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eChambered for \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003e5.56 NATO\u003c\/span\u003e\u003c\/strong\u003e and fully compatible with \u003cstrong\u003e.223 Remington\u003c\/strong\u003e, this unit is cut to the \u003cstrong\u003efull-auto M16 profile\u003c\/strong\u003e with the heavier M16-style carrier mass for reliable cycling under hard use. All critical parts are coated with the \u003cstrong\u003eBlack Nitride\u003c\/strong\u003e finish for a durable, low-friction surface.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eWhether you are building a new upper or replacing a worn carrier, this Fail Zero BCG gives AR-15, M4, and M16 platforms a drop-in mil-spec component that accepts standard gas keys, bolts, and firing pins.\u003c\/span\u003e\u003c\/p\u003e","brand":"Fail Zero","offers":[{"title":"Default Title","offer_id":55324675506498,"sku":"FZM16401NHBLACK","price":152.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/alt_bc0249c0-0cc8-4709-9f6c-4c45936d973f.jpg?v=1785152011","url":"https:\/\/centerfiresystems.com\/products\/fail-zero-5-56mm-nato-bolt-carrier-group-ar-15-m16-black-nitride-full-auto","provider":"Centerfire Systems","version":"1.0","type":"link"}