{"product_id":"wmd-nib-x-bcg-without-hammer-556","title":"WMD Guns NIB-X Bolt Carrier Group (Without Hammer) – AR-15\/5.56","description":"\u003cp\u003eThe WMD Guns NIB-X Bolt Carrier Group delivers a premium nickel boron coating for shooters who want reduced friction, easier cleaning, and extended component life in their AR-15 platform. This BCG is sold without the firing pin retaining pin (hammer), making it ideal for builders who already have this component or prefer to source it separately. The NIB-X coating provides exceptional lubricity and corrosion resistance compared to standard phosphate or nitride finishes.\u003c\/p\u003e\u003cp\u003eMachined from mil-spec Carpenter 158 steel (bolt) and 8620 steel (carrier), this BCG features proper staking, a chrome-lined interior, and full MPI\/HPT testing. The NIB-X coating is applied to all exterior and interior surfaces, reducing carbon buildup and allowing for faster, solvent-free cleaning. Installation is drop-in for any mil-spec AR-15 upper receiver. Note: You will need to supply your own firing pin retaining pin to complete assembly.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Bolt Carrier Group (without firing pin retaining pin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15, M16, M4, 5.56 NATO\/.223 Rem chamberings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Carpenter 158 steel bolt, 8620 steel carrier\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e NIB-X nickel boron coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in (mil-spec)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt carrier, bolt assembly, cam pin, firing pin (firing pin retaining pin NOT included)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WMD Guns","offers":[{"title":"Default Title","offer_id":47939838050559,"sku":"WMDNIBXBCG-0001","price":161.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1306296.jpg?v=1766548159","url":"https:\/\/doublestackstore.com\/products\/wmd-nib-x-bcg-without-hammer-556","provider":"Double Stack Store","version":"1.0","type":"link"}