{"product_id":"fz-m16-bolt-carrier-group","title":"FailZero M16 Bolt Carrier Group – AR-15\/M16 Compatible","description":"\u003cp\u003eThe FailZero M16 Bolt Carrier Group is a complete, drop-in replacement BCG for AR-15 and M16 platform rifles. This full-auto profile carrier features FailZero's proprietary EXO nickel boron coating, which provides permanent dry lubrication at the molecular level. The coating reduces friction, resists fouling buildup, and simplifies cleaning—no additional lubrication required under most conditions. Upgrading to a coated BCG like this one extends time between cleanings and improves reliability in adverse environments.\u003c\/p\u003e\u003cp\u003eConstructed from mil-spec 8620 steel (carrier) and 9310 steel (bolt), this BCG is MPI and HPT tested. The EXO coating is applied to all contact surfaces and penetrates the metal structure rather than sitting on top like traditional coatings, which means it won't flake or peel over time. Installation is drop-in for any mil-spec AR-15 or M16 upper receiver—no fitting or gunsmithing required. The M16 full-auto profile provides additional mass for reliable cycling with a wide range of ammunition weights and gas system lengths.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Complete bolt carrier group\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15, M16, and mil-spec AR platform rifles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 8620 steel carrier, 9310 steel bolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e EXO nickel boron coating (all contact surfaces)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e M16 full-auto\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTesting:\u003c\/strong\u003e MPI and HPT tested\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 Carrier, bolt assembly, cam pin, firing pin, firing pin retaining pin\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FailZero","offers":[{"title":"Default Title","offer_id":47937991639295,"sku":"FZ009-FZM164-01-NH","price":141.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1260875.jpg?v=1766499958","url":"https:\/\/doublestackstore.com\/products\/fz-m16-bolt-carrier-group","provider":"Double Stack Store","version":"1.0","type":"link"}