RTB 4.5" 9mm Upper Receiver - Black FLASH CAN 5.5" M-LOK Without BCG & CH - $115.96 after Code: BUILDUP20

Description

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 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 - Blowback
Twist Rate - 1:10 Twist
Muzzle - 1/2x36 Threaded
Weight - 8.3oz
9mm barrels do not have an index pin
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:

MATERIAL: HARD COAT ANODIZED/CERAKOTED ALUMINUM HANDGUARD, ALUMINUM BARREL NUT
PRECISION BORE
ACCEPTS M-LOK RAIL SECTIONS & ACCESSORIES
7075-T6 BARREL NUT
RAIL LENGTH IS MEASURED ALONG THE TOP
INNER DIAMETER: 1.36"

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.***

SKU: RTBBU-459MM5FC-BLK
UPC: