{"product_id":"lantac-m-spec-bcg-556-tin","title":"LanTac M-SPEC BCG 5.56 TIN – AR-15 Bolt Carrier Group","description":"\u003cp\u003eThe LanTac M-SPEC BCG delivers mil-spec reliability with enhanced durability through a Titanium Nitride (TIN) coating. This bolt carrier group meets or exceeds military specifications for 5.56 NATO\/.223 Remington AR-15 platforms, offering improved lubricity and corrosion resistance compared to standard phosphate finishes. The TIN coating reduces friction and carbon buildup, making post-range cleaning faster and easier while extending component life under high round counts.\u003c\/p\u003e\u003cp\u003eMachined from 8620 steel with a carpenter 158 steel bolt, this BCG features proper staking, a chrome-lined interior, and gas key secured to mil-spec torque values. The distinctive gold TIN finish isn't just cosmetic—it provides a hard, slick surface that helps maintain function in adverse conditions. Installation is drop-in for any mil-spec AR-15 upper receiver; no fitting or gunsmithing required. Includes bolt carrier, bolt assembly, cam pin, and firing pin.\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, 5.56 NATO\/.223 Remington\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 Titanium Nitride (TIN)\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, bolt assembly, cam pin, firing pin\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LanTac USA LLC","offers":[{"title":"Default Title","offer_id":47943836336383,"sku":"LAN01-MSPEC-556-TINBCG","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/3898927.jpg?v=1766603249","url":"https:\/\/doublestackstore.com\/products\/lantac-m-spec-bcg-556-tin","provider":"Double Stack Store","version":"1.0","type":"link"}