The AR-15 Bolt Carrier Group (BCG) is the heart of your firearm’s operating system. As one of the most critical components, ensuring you choose the right materials and finishes is essential for reliability, durability, and performance. At DirtyBirdUSA, we understand the importance of selecting the best BCG for your needs, so we’ve compiled this comprehensive … Continue reading A Guide to AR-15 Bolt Carrier Group Coatings and Materials