How to Choose the Right AR15 / M16 Bolt Carrier Group: Nitride, Chrome Phosphate, TiN Gold, and Nickel Boron Compared
Choosing the right AR-15/M16 bolt carrier group is crucial for reliability and performance. This guide compares popular BCG finishes—including nitride, chrome, phosphate, TiN gold, and nickel boron—to help you select the best option for your build or upgrade.