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

Description

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