{"product_id":"kak-ar15-bcg-m16-556-k-spec-c-p-blk","title":"KAK Industry AR-15 BCG M16 Profile 5.56 K-Spec Carpenter 158 Black Nitride","description":"\u003cp\u003eThe KAK Industry K-Spec Bolt Carrier Group delivers reliable function in direct impingement AR-15 rifles chambered in 5.56 NATO\/.223 Remington. Built to M16 profile specifications with a full-auto carrier, this BCG provides consistent carrier mass for proper cycling across a range of ammunition weights and buffer configurations. The extended carrier tail design helps improve reliability in carbine-length gas systems.\u003c\/p\u003e\u003cp\u003eManufactured from Carpenter 158 steel with proper heat treatment and shot-peened bolt, this BCG features a black nitride finish on all components for improved lubricity and corrosion resistance. The nitride coating reduces friction and simplifies cleaning compared to phosphate finishes. Gas key is secured with Grade 8 fasteners and properly staked. This is a drop-in replacement part requiring no fitting or modification for mil-spec AR-15 upper receivers.\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 rifles, 5.56 NATO\/.223 Remington\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 Black nitride\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e M16 full-auto carrier\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":"KAK Industry","offers":[{"title":"Default Title","offer_id":47938715386111,"sku":"KAK425-3312-001","price":188.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/4479432.jpg?v=1766526359","url":"https:\/\/doublestackstore.com\/products\/kak-ar15-bcg-m16-556-k-spec-c-p-blk","provider":"Double Stack Store","version":"1.0","type":"link"}