Maxim Defense MDX 508 300 Blk Mil-Spec Complete Upper - 8.5" Urban Grey

The MDX508 upper receiver is now available as a direct upgrade to your existing Mil-Spec lower receiver. 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.

• Features:
  1. Increased reliability due to included HATEBRAKE™
  2. Armorer level adjustable gas block
  3. M-slot compatible handguard
  4. Military-grade materials [17-4 Stainless Steel, 7075 and 6061 Aluminum]
  5. HK height rail for a more rigid upper receiver
  6. Installs on any Mil-Spec lower receiver
  7. Comes with Mil-Spec BCG
  8. Includes one 30rd Lancer Magazine

• Specifications:
  • Weight: 3 lbs 10 oz
  • Barrel Length: 8.5”
  • Calibers: 300 BLK