{"product_id":"bad-9mm-ar15-bolt-carrier-group-blk","title":"Battle Arms Development 9mm AR-15 Bolt Carrier Group – Black Nitride","description":"\u003cp\u003eThe Battle Arms Development 9mm AR-15 Bolt Carrier Group is engineered for shooters building or maintaining a 9mm AR-15 carbine or pistol. Unlike standard AR-15 BCGs, this unit uses a radial delayed blowback system designed specifically for pistol-caliber carbines, eliminating the need for a buffer weight system while providing reliable cycling with 9mm Luger ammunition. This BCG replaces standard .223\/5.56 bolt carrier groups and allows for a dedicated 9mm upper or complete build.\u003c\/p\u003e\u003cp\u003eConstructed from 8620 steel with a black nitride finish for corrosion resistance and reduced friction. The radial delayed blowback design uses symmetrical rollers to delay unlocking until chamber pressure drops to safe levels, resulting in smoother recoil and improved reliability compared to straight blowback systems. Installation is drop-in for compatible 9mm AR-15 uppers. No additional weights or specialized buffers required. This is a complete bolt carrier group ready to install.\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 9mm AR-15 Upper Receivers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 9mm Luger\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\u003eOperating System:\u003c\/strong\u003e Radial Delayed Blowback\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 Complete Bolt Carrier Group\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Battle Arms Development","offers":[{"title":"Default Title","offer_id":47937300037887,"sku":"BAD-BCG-9MM","price":179.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2855836.jpg?v=1766484195","url":"https:\/\/doublestackstore.com\/products\/bad-9mm-ar15-bolt-carrier-group-blk","provider":"Double Stack Store","version":"1.0","type":"link"}