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Nickel Boron BCG - Top 3 Reasons Your AR15 Needs One If you've heard about Nickel Boron Bolt Carrier Groups and wondered what all the fuss was about, you've come to the right place!What are the advantages of a Nickel Boron BCG?Are they worth the money?Do I need one in my AR15 or my AR Pistol?Below are the top 3 reasons your AR15 might need one. Reason #1 - Reliability Of all AR15 parts, th …

AR15 BCG finishes (l-r) Black Nitride, BCM BCG with Phosphate, BCM BCG with NP3, FailZero with EXO Nickel Boron, Toolcraft with EXO Nickel Boron, Hard ChromeThere are a wide variety of finishes available for AR15 bolt carrier groups (BCGs) today and we take a look at some of the more popular ones below. Hard ChromeColt BCG with matte chrome finish and nickel boron gas keyThe first AR15 bolt carrier groups were hard chrome plated. This was at the direction of Eugene Stoner, the designer …