RTB 8.3" 9mm Upper Receiver - Black | Fluted Comp | 9" M-LOK | Without BCG & CH

RTB Barreled 8.3" 9mm Upper Receiver | FLASH CAN | 9" M-LOK

NO BCG OR CHARGING HANDLE INCLUDED

This Barreled 8.3 inch M-LOK upper receiver comes with a 9 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	Specifications
Caliber	9mm
Length	8.3"
Material	4150 Chrome Moly Vanadium
Profile	Straight
Finish	QPQ Corrosion Resistant
Gas System Length	Blowback
Dimpled?	No
Twist Rate	1:10
Muzzle Thread	1/2x36
Weight	13.8oz

Upper Receiver:

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

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"