5.56/300 Blackout Nitride MPI Full-Auto Profile Bolt Carrier Group

$119.99
(11 reviews) Write a Review
SKU:
BRK351
Maximum Purchase:
3 units

Breek Arms is dedicated to using the right components for the most reliable functioning AR builds. The most important part in your AR15 is the bolt carrier group. This is why we’ve found a superior BCG with a high quality low friction nitride coating that protects against corrosion and heat that an AR15 endures over time. Each bolt carrier group under goes a magnetic particle inspection (MPI) to ensure you get a simple, no frill BCG that provides you with the reliability and performance you expect from a high end AR15. This BCG has the full-auto profile, but it will also perform perfectly in your semi-auto builds, and even in a full-auto build if you are lucky enough to have that opportunity.

Specs

  • New AR15 Bolt Carrier Group
  • Fully Assembled Bolt & Carrier Assembly
  • Caliber: .223/5.56 & 300AAC/Blackout
  • Carrier Steel: 8620
  • Carrier Finish: Nitride
  • Bolt Finish: Nitride
  • Bolt Steel: 9310
  • Profile: Full Auto Profile
  • Gas Key: 4140 Billet Gas Key with Grade 8 Hardened Fasteners, Staked per MilSpec
  • Bolt is Magnetic Particle Inspected (MPI)
  • Fastened with Grade 8 screws
  • Staked Per Mil-Spec
  • Firing pin machined from 17-4 H-900 Stainless Steel
  • Retaining pin 
  • Cam pin also 4140 with Nitride Finish
  • All Parts Made in the USA

Out of stock

Breek Arms is dedicated to using the right components for the most reliable functioning AR builds. The most important part in your AR15 is the bolt carrier group. This is why we’ve found a superior BCG with a high quality low friction nitride coating that protects against corrosion and heat that an AR15 endures over time. Each bolt carrier group under goes a magnetic particle inspection (MPI) to ensure you get a simple, no frill BCG that provides you with the reliability and performance you expect from a high end AR15. This BCG has the full-auto profile, but it will also perform perfectly in your semi-auto builds, and even in a full-auto build if you are lucky enough to have that opportunity.

Specs

  • New AR15 Bolt Carrier Group
  • Fully Assembled Bolt & Carrier Assembly
  • Caliber: .223/5.56 & 300AAC/Blackout
  • Carrier Steel: 8620
  • Carrier Finish: Nitride
  • Bolt Finish: Nitride
  • Bolt Steel: 9310
  • Profile: Full Auto Profile
  • Gas Key: 4140 Billet Gas Key with Grade 8 Hardened Fasteners, Staked per MilSpec
  • Bolt is Magnetic Particle Inspected (MPI)
  • Fastened with Grade 8 screws
  • Staked Per Mil-Spec
  • Firing pin machined from 17-4 H-900 Stainless Steel
  • Retaining pin 
  • Cam pin also 4140 with Nitride Finish
  • All Parts Made in the USA

11 Reviews Hide Reviews Show Reviews

  • 5
    300 blackout bcg

    Posted by John m. on Jan 13th 2021

    Super fast shipping
    Exactly what I ordered ordered a bcg and a t-shirt my favorite new shirt
    Great products will definitely order from breek arms again!!!!!

  • 5
    Great BCG

    Posted by Omar Karim on Nov 28th 2020

    Searched for milspec BCGs for a good price everywhere. Breek Arms doesnt offer a milspec BCG, they offer a better one, for less. Average 158 Carpenter steel in milspec BCGs is acceptable, the 9310 steel in this BCG is 7% is stronger than 158, and for $50 less than the inferior competition

  • 5
    BCG

    Posted by Cody Simons on Nov 23rd 2020

    Top notch as usual from you fine folks, bcg functions flawlessly!!!