{"product_id":"angstadt-ar15-bcg-556nato-blk","title":"Angstadt Arms AR-15 Bolt Carrier Group 5.56 NATO – Black Nitride Finish","description":"\u003cp\u003eThe Angstadt Arms AR-15 Bolt Carrier Group delivers reliable cycling and extraction in 5.56 NATO chambered rifles. This BCG replaces worn factory components or serves as a backup carrier group for shooters who maintain multiple uppers. The black nitride treatment provides corrosion resistance and reduces friction for smoother operation and easier cleaning compared to phosphate-coated carriers.\u003c\/p\u003e\u003cp\u003eMachined from 8620 steel with a properly staked gas key, this carrier group features black nitride finish on all surfaces for durability and lubricity. Installation is drop-in for standard AR-15 rifles—no fitting or gunsmithing required. Includes bolt, carrier, 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 rifles chambered in 5.56 NATO \/ .223 Remington\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 8620 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\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Angstadt Arms","offers":[{"title":"Default Title","offer_id":47944016527615,"sku":"ANGAA56BCGNIT","price":130.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2140098.jpg?v=1766612248","url":"https:\/\/doublestackstore.com\/products\/angstadt-ar15-bcg-556nato-blk","provider":"Double Stack Store","version":"1.0","type":"link"}