AR-15 Bolt Carrier Group (BCG) Buyers Guide: Treatments, Materials, & Specs
There are two major components that will likely determine the performance of your AR-15: the barrel and the bolt carrier group.
In this video I go over the basics of the AR-15 Bolt Carrier Group: what the markings mean, what to look for, what makes a good one, what makes a bad one, and recommend a few brands that I've had good luck with over the years.
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