9mm Upper Receiver Kit: Your Guide to BCGs, Charging Handles, and More
Understanding Your 9mm Upper Receiver The foundation of your 9mm AR lies in its upper receiver assembly. Unlike its .223/5.56mm counterparts, the 9mm AR requires specific components to function correctly with the 9mm Luger cartridge. This assembly houses the barrel, handguard, upper receiver itself, the BCG, and the charging handle. The upper receiver, the main … Read more