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AR15 BCG finishes (l-r) Toolcraft Titanium Nitride, BCM BCG with Robar NP3+, Toolcraft Nickel Boron, Toolcraft Black Nitride, Colt BCG refinished in Chrome with Nickel Boron Gas Key, Toolcraft Diamond Like Carbon (DLC) Finish, Toolcraft Chrome Phosphate There 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 Chrome Colt BCG with matte chrome finish and nickel boron gas key The …

Nickel Boron BCG - Top 3 Reasons Your AR15 Needs OneIf 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, the  BCG is without a doubt the most critical component for proper functioning. It is not o …