What is a Bolt Carrier Group (BCG)?
The AR-15 has a locking rotating bolt design, and the Bolt carrier group is perhaps the most important part of the rifle. The BCG, or B...
Explore our bolt carrier group (BCG) category for the heart of your AR-15, AR 9MM, and AR-308 rifles. Our selection includes a variety of high-quality BCGs designed for reliability, durability, and performance. Whether you’re building a new rifle or upgrading an existing one, find the perfect BCG to ensure flawless operation and improved shooting experience.