Home > Rifle Parts >

AR15 .458 Socom BCG - Nickel boron bolt carrier group

AR15 .458 Socom BCG - Nickel boron bolt carrier group

Alternative Views:

List Price: $175.99
Our Price: $146.99
Savings: $29.00

Quantity in Stock:(Out of Stock)
Product Code: 1347712155734


AR15 .458 Socom Nickel Boron Bolt Carrier Group

AR .458 Socom BCG Nickel Boron Finish, MIL-SPEC Carrier, Bolt and Key is the Best in Industry!

R&B ARMS .458 Socom 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 nickel boron finish, MIL-SPEC dimensions, and a 9310 steel bolt. The carrier is made from 8620 steel, While the Key is made from 4130 and is properly staked. Nickel Boron offers lubricity, 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 business

Nickel Boron is the top of the line coating. It is engineered to minimize friction by cutting down the surface to surface contact between sliding parts. Nickel Boron not only reduces friction, but also dissipates heat, allowing for least wear and tear.

Our dedication to our customers is the same as our dedication to our country!

We will ensure satisfaction with every AR .458 Socom BGC and make sure its the right fit for your rifle.


  • Coefficient of Friction - 0.5 - 0.8
  • Hardness - 82 Rc
  • Max. Temperature - 600° F - 700° F
  • Coating Thickness - 0.00035" - 0.0005"
  • lubricity
  • Wear Resistant
  • Smoother recoil
  • Improved Consistency
  • Faster Cyclic Rate
  • Easier Cleaning
  • Reduced Carbon Fouling

*Picture may reflect a different caliber


Domestic aircraft quality 8620 steel.
Gas Key: 4130 steel, Grade 8 gas key screws (properly staked)
Bolt:158 Carpenter steel
Extractor:4140 steel
Mil-Spec O-ring
Mil-Spec Gas Rings (3)
Cam Pin: 4140 steel
Firing Pin: Hard Chrome, Ground 8740
MPI Tested
Nickel Boron Coating

Share your knowledge of this product. Be the first to write a review »