M16 vs AR15 BCG [Subtle Details Explained]
The Bolt Carrier Group (BCG) is often referred to as the heart of any AR-style rifle. It’s a crucial component that interacts directly with the rounds fired, striking the primer, ejecting the spent casing, and chambering a fresh round. When it comes to BCGs, there are two main categories: AR-15 BCGs and M16 BCGs. Here’s …