Maxim Defense Maxim SDX-510Integrally Suppressed Upper Receiver 5.56 Nato 10.3 in. Black w/DSX Suppressor MXM-49763

The MDX510 upper receiver is compatible with your existing Mil-Spec lower and is packed with Maxim Defense quality. It comes with either our Mil-Spec bolt carrier group or SCW bolt carrier group for those using our SCW system. For those wanting a standard length short barrel, the 10.3? barrel of the MDX510 is your best choice. Like our other uppers, the MDX510 includes our HATEBRAKE for increased reliability, Radian Raptor charging handle, and Maxim Defense hand stop. 1. Increased reliability due to included HATEBRAKE;Armorer level adjustable gas block;M-slot compatible handguard;Comes with Mil-Spec or PDX BCG