{"product_id":"lantac-usa-m-spec-bcg-5-56-223-black-nitride-ar-15-bolt-carrier-group","title":"LANTAC USA M-SPEC BCG 5.56\/.223 Black Nitride AR-15 Bolt Carrier Group","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eLANTAC USA M-SPEC Bolt Carrier Group\u003c\/span\u003e\u003c\/strong\u003e is a premium \u003cstrong\u003e5.56\/.223\u003c\/strong\u003e BCG precision machined to milspec dimensions and tolerances for the AR-15, M16, and M4 platform. It is built around an M16 full-auto profile carrier with increased mass for reliable cycling, and pairs a \u003cstrong\u003e8620 steel\u003c\/strong\u003e carrier with a shot-peened Carpenter 158 or 9310 steel bolt and \u003cstrong\u003e17-4 stainless steel\u003c\/strong\u003e components throughout the assembly. The entire bolt carrier group is finished in a QPQ \u003cstrong\u003eBlack Nitride\u003c\/strong\u003e coating that boosts corrosion resistance, reduces friction during operation, and stands up to hard use in the field or on the range. Whether you're assembling a duty-grade rifle from the ground up or replacing a worn BCG in an existing build, the M-SPEC delivers milspec-grade performance that has made LANTAC USA a trusted name in AR-15 components.\u003c\/span\u003e\u003c\/p\u003e","brand":"LANTAC USA","offers":[{"title":"Default Title","offer_id":55075308536130,"sku":"194108","price":160.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_a5b1d3da-7b34-474a-994a-242281ec7914.png?v=1784754205","url":"https:\/\/centerfiresystems.com\/products\/lantac-usa-m-spec-bcg-5-56-223-black-nitride-ar-15-bolt-carrier-group","provider":"Centerfire Systems","version":"1.0","type":"link"}