Pistol Upper Complete - Match Grade [12.5"] [300 Blackout]


The complete upper half to our 12.5" SBR - ready to be used on a pistol lower, or registered SBR lower. The 300 Blackout is a noticeable upgrade from the 5.56 in terms of knockdown power and adaptability. With the exception of the barrel, the 300 Blackout uses all of the same core components as the 5.56 caliber such as magazines and other accessories. One notable feature of our 12.5" 300 Blackout upper is that it is suppressor ready, with a standard 5/8”-24 threaded muzzle. This upper is capable of shooting both subsonic and supersonic ammunition made possible by several parts, one being our adjustable gas block. Two models in this configuration are available, which come standard with our KeyMod Free Floating Rail System and Fluted 1:8 Twist Barrel. Experience the 300 Blackout caliber as it is meant to be with the DEZ-300-12.5P Upper.

What's All Included - Materials & Specs:

  • Upper Receiver: Mil-Spec A4 Forged 7075-T6 Aluminum with M4 Grooved Feed Ramps and Charging Handle.
  • Bolt Carrier Group: Nitride Coated, Mil-Spec+ with Properly Staked Gas Key. MPI Tested. Auto-Carrier.
  • Gas System: Adjustable Low Profile with Pistol Length Gas Tube.
  • Forearm: DEZ Arms KeyMod FreeFloat Handguard, Mid Length. Includes 1 5-slot Modular Rail Segment.
  • Barrel: DEZ Arms, Inc. 300 Blackout Chamber, 4150 ChromeMoly Vanadium Steel, Phosphate Coated, 6-Groove Button Rifling, Lapped, 1:8 Right Hand Twist, M4 Feed Ramped Extension, 12.5” H-Bar Fluted Contour, 5/8”- 24 Threaded Muzzle, Pistol Gas, Match-Grade Quality.
  • Muzzle Device: 5/8”-24 Fake Suppressor and A2 Flash Hider.


DEZ Tactical Arms, Inc. offers a lifetime warranty on all complete uppers. Our uppers are guaranteed to be free from manufacturer defect. If there is something wrong with your upper, DEZ Tactical Arms will inspect, and if necessary fix or replace the product with no cost to you. This warranty doesn't cover accidental damage caused by the user, or any damage done from installation or use with other manufacturer's products. Full details can be found in our owner's manual. Proof of purchase is required for any warranty claim.

Additional Notes:

  • This upper comes shipped as pictured. Also includes a standard A2 Flash Hider Muzzle Device.
  • Custom Barrel fluting options are available! Your choice of straight or twist fluting.
  • Upper must be used on a either a registered pistol lower, or registered SBR lower receiver. All NFA rulings apply.


 This item qualifies for Free Shipping!

Pistol Upper Complete - Match Grade [12.5"] [300 Blackout]
Click To Enlarge
  • Item #: DEZ-UC300-12.5P
  • Manufacturer: DEZ Tactical Arms
Price $849.00
Availability Out-of-Stock
Reviews (0) Write a Review
No Reviews. Write a Review