raineirarms
Rainier Arms Free Ground Shipping

Maxim Defense MDX 508 300 BLK Mil-Spec Complete Upper - 8.5"

Complete Upper

In stock


Maxim Defense MDX 508 300 BLK Mil-Spec Complete Upper - 8.5"

$1,255.50

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 bolt carrier group. Radian Raptor charging handle, and Maxim Defense hand stop, ready to shoot right out of the box.


Features:

  • Increased reliability due to included HATEBRAKE™
  • Armorer level adjustable gas block
  • M-slot compatible handguard
  • Military-grade materials [17-4 Stainless Steel, 7075 and 6061 Aluminum]
  • HK height rail for a more rigid upper receiver
  • Installs on any Mil-Spec lower receiver
  • Comes with Mil-Spec bolt carrier group


Specifications:

  • Weight: 3 lbs 10 oz
  • Barrel Length: 8.5”
  • Calibers: 300 BLK
More Information
SKU MD-MDX-508-300-BLK-CU-8.5
Product Type Complete Upper
Manufacturer Maxim Defense
Rail Length 9.5"
Mount M-LOK
Barrel Length 8.5"
Caliber 300 Blackout

Product Recommendations

Google Customer Reviews Google Customer Reviews