CMMG 55DE10A Barrel Sub-Assembly M4 5.56 NATO 16.1 AR-15 4140 Chrome Moly Steel Black Nitride

Unleashing Performance: The CMMG M4 5.56 NATO 16.1" Barrel Sub-Assembly for AR-15 Builders For anyone embarking on the rewarding journey of building a custom AR-15, or seeking to upgrade a critical component of their existing rifle, the choice of barrel is paramount. It's the very core of your fire