4.5" 9mm Upper Receiver -Black | FLASH CAN | 5.5" M-LOK Slant Cut | Without BCG & CH

Rating: Total Reviews: 0 Write a Review
Product Code: RTB459MM55
MSRP: $279.95
Sale Price: Sale Price: $229.95
Click for Price

Out of stock

Barreled 4.5" 9mm Upper Receiver | FLASH CAN | 5.5" M-LOK Slant Cut | Without Bolt Carrier Group and Charging Handle


Click here for Charging Handles

Click here for Bolt Carrier Groups

This Barreled 4.5 inch M-LOK upper receiver comes with a 5.5 inch free-float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 M4 barrel.


  • Barrel Material: 4150 CMV Steel
  • Barrel Caliber: 9MM (9x19mm)
  • Barrel Twist: 1:10
  • Barrel Length: 4.5”
  • Finish: Black QPQ Salt Bath Nitride
  • Muzzle Thread: 1/2x36" TPI (Threads Per Inch)
  • 11-degree Target Crown

Upper Receiver:

  • Machined from a Mil-Spec 7075 T6 Forging
  • Black Anodization


  • 5.5" free-float handguard
  • MIL-STD 1913 Picatinny rail on top
  • 2 M-Lok slots on 3 sides
  • Precision Machined 6000 Series aluminum, for high strength and weight savings
  • Clamp-on system for easy assembly
  • Steel Barrel nut to resist movement under heat
  • Made in the USA
***Please allow an additional 2-3 business days of lead time as these uppers are made to order.***