Want a lighter, faster, and more manageable rifle? The RISE Armament RA-1010 is where you start. Packing exceptional performance in a lightweight - but full-power package - RISE Armament designed the RA-1010 Low-Mass Bolt Carrier Group (BCG) to help you shoot more accurately. With a reduced reciprocating mass during the firing cycle, it lessens recoil and helps you stay on target. The complete BCG weighs in at just less than 8.9 ounces. Its black nitride finish enhances strength and reduces friction for improved performance. It's also available in nickel boron which reduces friction, improves overall performance, and makes it easier to clean. Coating: Black Nitride or durable, friction-reducing Nickel Boron coating Precision manufactured and individually inspected to ensure high-level performance Strong, easy-to-clean black nitride finish Compatible with lighter buffers to allow faster follow-up shots Individually MPI tested Bolt: 9310 MPI tested Carrier: 8620 tool steel heat treated and case hardened Gas key: tool steel - grade 8 hardened fasteners and staked properly Cam pin: 4140 steel Extractor: tool steel - shot peened Lightweight - only 8.9 oz.