CMMG 55DC70A Barrel Sub-Assembly 5.56x45mm NATO 16.10" Black Nitride Finish 4140 Chromoly Steel Material Midlength with Medium Taper Profile for AR-15 Shotshell Buckshot Loads React quickly and quietly with

React quickly and quietly with the Ameristep Jakehouse

injection molded mag follower & mag spring formed from heat treated chrome silicone wire

a watertight silicone O-ring lid

clear images in a reliable thermal optic

This re-creation pays homage to the original made for NASAs Gemini and Apollo missions program that ultimately traveled through the sea of tranquility to the Moon a total of nine times

CMMG 55DC70A Barrel Sub-Assembly 5.56x45mm NATO 16.10" Black Nitride Finish 4140 Chromoly Steel Material Midlength with Medium Taper Profile for AR-15 Shotshell Buckshot Loads React quickly and quietly withCMMG's Barrel Sub Assembly is ideal for building your custom AR 15 upper group. It comes with properly installed M4 barrel extension.