Builder's Grade 4.5" 9mm Upper Receiver - Black | FLASH CAN | 4.25" M-LOK | Without Bolt Carrier Group and Charging Handle
This 4.5 inch M-LOK upper receiver comes with a 4.25 inch free float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel making the action smooth and easy to keep clean.
- Length - 4.5"
- Material - 4150 Chrome Moly Vanadium
- Profile - Straight
- Finish - QPQ Corrosion Resistant
- Gas System Length - None
- Gas Block Journal - N/A
- Twist Rate - 1:10 inches
- Muzzle - 1/2x36 Threaded
- Weight - 8.3oz
This .22LR / 9mm upper receiver assembly is made from forged 7075-T6 aluminum and is Hard Coat Anodized. It meets military specifications and comes in a true slick side configuration. The ejection port door is sized for 9mm and 22LR. This upper does not have a shell deflector, nor does it have a forward assist.
Machined from a Mil-Spec 7075 T6 forging
Type III Hardcoat Anodized finish
- 4.25" free float handguard
- MIL-STD 1913 Picatinny rail on top
- 1 M-Lok slots on 3 sides
- Precision Machined 6000 Series aluminum, for high strength and weight savings
- Steel Barrel nut to resist movement under heat
- Made in USA
Please Note: Uppers may present light fouling from our quality control process and/or test firing
***Please allow an additional 2-3 business days of lead time as these uppers are made to order.***