Maxim Defense Industries MDX 508 U.R.G. AR-15 5.56x45mm NATO 8.5 inch Upper Receiver Pistol Length 1-7 Twist 1/2x28 HATEBRAKE Urban

Maxim Defense Industries MDX 508 U.R.G. AR-15 5.56x45mm NATO 8.5 inch Upper Receiver Pistol Length 1-7 Twist 1/2x28 HATEBRAKE Urban. It features an 8.5 barrel making it ideal for close-quarters situations. The included HATEBRAKE increases reliability and is tucked under the 9.5 handguard. These upper receiver groups ship complete including a Maxim Defense Mil-Spec or SCW bolt carrier group Radian Raptor charging handle and Maxim Defense hand stop ready to shoot right out of the box Specification