If you want to upgrade or build a rifle, starting with an AR-15 complete upper is smart. These uppers come fully assembled—often including the bolt carrier group (BCG) and charging handle (CH)—and can significantly streamline your build process. However, one of the biggest questions for any AR enthusiast is: Which caliber should I choose for my complete upper? This … Continue reading Choosing the Right Caliber for Your AR-15 Complete Upper: A Comprehensive Guide