{"product_id":"spikes-bcg-5-56-nib","title":"Spike's Tactical 5.56 Bolt Carrier Group – Nickel Boron Finish","description":"\u003cp\u003eThe Spike's Tactical 5.56 Bolt Carrier Group delivers reliable cycling for AR-15 platform rifles chambered in 5.56 NATO and .223 Remington. This full-auto profile BCG features a nickel boron (NiB) coating that reduces friction and simplifies cleaning compared to standard phosphate finishes. Designed as a direct replacement for worn or damaged carrier groups, it's also a popular upgrade for shooters who want easier maintenance and smoother operation.\u003c\/p\u003e\n\n\u003cp\u003eThe nickel boron finish is applied to all contact surfaces, providing a slick, self-lubricating surface that resists carbon buildup. Properly staked gas key and MPI-tested bolt ensure reliable function. This is a drop-in component for mil-spec AR-15 upper receivers—no gunsmithing required. Simply remove your old BCG, inspect and lubricate, then install.\u003c\/p\u003e\n\n\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 Nickel Boron (NiB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Full-auto\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, firing pin retaining pin\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spike's Tactical","offers":[{"title":"Default Title","offer_id":47938905276671,"sku":"SPKST5BG03","price":209.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1336346.jpg?v=1766536261","url":"https:\/\/doublestackstore.com\/products\/spikes-bcg-5-56-nib","provider":"Double Stack Store","version":"1.0","type":"link"}