Description
This Complete 4.5 inch M-LOK upper receiver comes with a 4 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 and our black nitride bolt carrier group that is finished with an incredible polish, making the action smooth and easy to keep clean.
Barrel:
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
Bolt Carrier Group:
Colt & Glock Compatible
USA made 8620 Steel Carrier Construction
Phosphated or Nitrided Finish
Heavy Firing Pin Retaining Spring
13.7 oz.
Upper Receiver:
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
Handguard:
4" free float handguard
MIL-STD 1913 Picatinny rail on top
1 M-Lok slots on 3 sides
Precision Machined aircraft grade aluminum, for high strength and weight savings
Steel Barrel nut to resist movement under heat
Made in USA
Charging Handle:
Alloy Charging Handle Assembly
Complete with Standard Latch
Made from hardcoat anodized aluminum
Black finish
Please Note: Uppers may present light fouling from our quality control process and/or test firing
SKU: BG459MM4INA2-BLK
