{"product_id":"cmc-enhanced-bcg-ar15-ntrd-mil-spec","title":"CMC Triggers Enhanced Bolt Carrier Group – AR-15 Nitride Mil-Spec","description":"\u003cp\u003eThe CMC Enhanced Bolt Carrier Group replaces factory AR-15 bolt carriers with a precision-machined upgrade designed for improved reliability and durability. Built to mil-spec dimensions, this BCG drops into any standard AR-15 upper receiver and addresses common wear points with upgraded materials and surface treatments. Shooters upgrade to this BCG for smoother cycling, reduced friction, and extended service life in both recreational and duty applications.\u003c\/p\u003e\u003cp\u003eThe carrier and bolt are machined from 8620 steel and Carpenter 158 steel respectively, then treated with a nitride finish that penetrates the metal surface for exceptional hardness and corrosion resistance. The nitride coating also reduces friction and carbon buildup, making cleaning faster and easier. This is a drop-in installation requiring no fitting or modification—disassemble your upper, swap the BCG, and reassemble. Gas key is properly staked per mil-spec standards.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Bolt Carrier Group\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15, M16, M4 (5.56 NATO\/.223 Rem)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 8620 Steel Carrier, Carpenter 158 Steel Bolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Nitride\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpec:\u003c\/strong\u003e Mil-Spec Dimensions\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 Complete Bolt Carrier Group (carrier, bolt, cam pin, firing pin, retaining pin)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CMC Triggers","offers":[{"title":"Default Title","offer_id":47943489388799,"sku":"CMC81631","price":182.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1254134.jpg?v=1766578466","url":"https:\/\/doublestackstore.com\/products\/cmc-enhanced-bcg-ar15-ntrd-mil-spec","provider":"Double Stack Store","version":"1.0","type":"link"}