{"product_id":"rise-low-mass-bcg-223-5-56-nib","title":"Rise Armament Low Mass BCG .223\/5.56 NIB – AR-15\/M16 Bolt Carrier Group","description":"\u003cp\u003eThe Rise Armament Low Mass BCG reduces reciprocating mass to decrease felt recoil and improve cyclic rate in competition AR-15 platforms. By removing material from non-critical areas of the carrier body, this bolt carrier group weighs approximately 25% less than a standard mil-spec BCG, allowing for faster lock time and reduced muzzle movement during rapid fire. The reduced mass also decreases bolt bounce and carrier tilt, contributing to more consistent accuracy in 3-gun and precision rifle applications.\u003c\/p\u003e\u003cp\u003eConstructed from 8620 steel with a machined carrier body and shot-peened bolt, this BCG features a Nickel Boron (NIB) coating on all contact surfaces. The NIB finish provides superior lubricity and corrosion resistance compared to phosphate, reducing friction and simplifying cleaning. This is a drop-in upgrade for any AR-15 or M16 chambered in .223 Remington or 5.56 NATO. Gas system tuning may be required for reliable function with the reduced mass, particularly in carbine-length systems or suppressed firearms. Includes staked gas key and extractor with O-ring.\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, M16 (.223 Remington\/5.56 NATO)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 8620 Steel Carrier, Shot-Peened Bolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Nickel Boron (NIB)\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 BCG Assembly, Staked Gas Key, Extractor with O-Ring\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rise Armament","offers":[{"title":"Default Title","offer_id":47939527278847,"sku":"RISERA-1010-NIB","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2872984.jpg?v=1766543960","url":"https:\/\/doublestackstore.com\/products\/rise-low-mass-bcg-223-5-56-nib","provider":"Double Stack Store","version":"1.0","type":"link"}