{"product_id":"lantac-556-enhanced-bcg-blk-nitride","title":"LanTac 556 Enhanced BCG Black Nitride – AR-15 Bolt Carrier Group","description":"\u003cp\u003eThe LanTac 556 Enhanced BCG is a mil-spec bolt carrier group designed for AR-15 and M16 pattern rifles chambered in 5.56 NATO\/.223 Remington. This enhanced carrier features precision machining and quality control standards intended to improve reliability and service life over standard-issue components. The design maintains full-auto profile compatibility while offering refinements in gas key staking, extractor spring tension, and carrier geometry.\u003c\/p\u003e\u003cp\u003eFinished in black nitride (also known as melonite or QPQ), the carrier and bolt receive a case-hardened surface treatment that penetrates the metal rather than coating it. This process reduces friction, improves corrosion resistance, and simplifies cleaning compared to phosphate finishes. The bolt carrier group is a drop-in replacement for mil-spec AR-15\/M16 upper receivers and requires no fitting or gunsmithing for installation in standard platforms.\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 (5.56 NATO\/.223 Remington)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Carpenter 158 bolt steel, 8620 carrier steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Nitride\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 Bolt, carrier, cam pin, firing pin, extractor assembly, gas rings\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LanTac USA LLC","offers":[{"title":"Default Title","offer_id":47943841284351,"sku":"LAN01UP556NITEBCG","price":261.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1271683.jpg?v=1766603352","url":"https:\/\/doublestackstore.com\/products\/lantac-556-enhanced-bcg-blk-nitride","provider":"Double Stack Store","version":"1.0","type":"link"}