Rise Bolt Carrier Group Nickel Boron for 5.56 AR-15 Boost your AR-15's performance with the RA-1010 Low-Mass Bolt Carrier Group by Rise Armament. Engineered with a Nickel Boron finish for durability and smooth operation this lightweight BCG weighs less than 8.9 ounces to reduce recoil and maintain accuracy. Crafted from steel it's built to deliver long-lasting reliability while enabling faster follow-up shots with less muzzle movement. Perfect for competitive shooting or enhancing your firearm's handling this low-mass BCG takes your rifle to the next level.