GM Bolt carrier groups come MPI inspected. Perfect for your next 7.62x39 AR-15 build. Specifications:
Why do others substutute other inferior/untested steels? To decrease the cost of the part. Carpenter 158® is a high technology steel that is very expensive and can only be ordered in 20,000 lb mill runs. It is the only steel allowed by the US (and Foreign) Militarys for the very demanding needs of this high stress, critical part.
LIFETIME WARRANTY:
Our products carry a lifetime, no questions asked, warranty. Simply put... Should any of our products fail, return it to us for a brand new replacement.
