BG Complete 4.5" 9mm Upper Receiver - Black | A2 | 4" M-LOK | With BCG & CH

BUILDER'S GRADE COMPLETE 4.5" 9MM UPPER RECEIVER - BLACK | A2 FLASH HIDER | 4" M-LOK | WITH BOLT CARRIER GROUP AND CHARGING HANDLE

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



***Please allow an additional 2-3 business days of lead time as these uppers are made to order.***