R&B ARMS AR15 5.56 Nickel Boron Bolt Carrier Group is a great choice for any AR-15 build. This drop-in AR-15 BCG features a slick, corrosion resistant Ion Bond finish, MIL-SPEC dimensions, and C158 steel bolt. The carrier is made from 8620 steel, While the Key is made from 4130 and is properly staked. Ion Bond offers Increased lubricity Over Nickel Boron, Wear Resistant, Smoother recoil, Improved Consistency, Faster Cyclic Rate, Easier Cleaning, and Reduced Carbon Fouling. Proudly made in the U.S.A. veteran owned and operated businessIonBond is a Diamond Like Coating. This metal finish applied through Physical Vapor Deposition Process. It is tough corrosion proof coating, with excellent friction properties. Ionbond will not chip, crack or peel, providing you with years of protection against wear while maintaining its integrity.Our dedication to our customers is the same as our dedication to our country!
We will ensure satisfaction with every AR15 556 BGC and make sure its the right fit for your rifle.
*Picture may reflect a different caliberSpecifications:Carrier: Domestic aircraft quality 8620 steel.Gas Key: 4130 steel, Grade 8 gas key screws (properly staked)Bolt:158 Carpenter steelExtractor:4140 steelMil-Spec O-ringMil-Spec Gas Rings (3)Cam Pin: 4140 steelFiring Pin: Hard Chrome, Ground 8740MPI Tested