{"product_id":"lantac-usa-m-spec-bcg-308-7-62mm-nickel-boron-bolt-carrier-group","title":"LANTAC USA M-SPEC BCG .308\/7.62mm Nickel Boron Bolt Carrier Group","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eLANTAC USA M-SPEC\u003c\/span\u003e\u003c\/strong\u003e Bolt Carrier Group is a precision-machined mil-spec BCG engineered for \u003cstrong\u003e.308 Winchester \/ 7.62mm\u003c\/strong\u003e AR-10 platform rifles. The carrier is full-auto style with \u003cstrong\u003eincreased mass\u003c\/strong\u003e, cut from \u003cstrong\u003e8620 steel\u003c\/strong\u003e, case hardened, and hard turned and ground so that all internal dimensions are held to exact mil-spec tolerances.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe M-SPEC carrier uses an improved cam path that increases pressure dwell time on the bolt, holding it closed longer during firing - a useful feature for over-gassed AR-10 builds. The \u003cstrong\u003eNickel Boron\u003c\/strong\u003e finish on the carrier and bolt delivers a smooth, low-friction surface that simplifies cleaning and resists corrosion in the field.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eDesigned as a drop-in mil-spec replacement for \u003cstrong\u003eAR-10 \/ LR-308\u003c\/strong\u003e pattern rifles chambered in \u003cstrong\u003e.308 Winchester \/ 7.62x51mm NATO\u003c\/strong\u003e, the LANTAC USA M-SPEC BCG is a reliable foundation for duty, hunting, and general-purpose builds.\u003c\/span\u003e\u003c\/p\u003e","brand":"LANTAC USA","offers":[{"title":"Default Title","offer_id":55075316564290,"sku":"194110","price":224.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_5c435329-c1fe-4d33-9e28-d4d31df8ea66.png?v=1784754249","url":"https:\/\/centerfiresystems.com\/products\/lantac-usa-m-spec-bcg-308-7-62mm-nickel-boron-bolt-carrier-group","provider":"Centerfire Systems","version":"1.0","type":"link"}