Description
**This Product Ships FULLY ASSEMBLED***
This complete 18-inch M-LOK upper receiver comes with our RTB 15-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
Specifications
Caliber 5.56
Length 18"
Material 4150 Chrome Moly Vanadium
Profile Government
Finish QPQ Corrosion Resistant
Gas System Length Rifle Length
Gas Block Journal .750"
Dimpled? Yes
Twist Rate 1:7
Muzzle Thread 1/2x28 TPI
Weight 30.4oz
Barrel Extension M4 Feed Ramps
Target Crown 11 Degree
Bolt Carrier Group:
Enhanced 9310 Steel (Bolt)
8620 Tool Steel (Carrier)
Bolt is shot Peened and MPI
All BCG components are pre-polished before being processed and then post polished for an incredible shine
Upper Receiver:
Machined from a Mil-Spec 7075 T6 forging
Cerakote or Hard Coat Anodized per Mil-A-8625F, Type III
M4 Feed ramps
Made in the U.S.A.
Handguard:
MATERIAL: HARD COAT ANODIZED OR CREAKOTED ALUMINIUM
PRECISION BORE
ACCEPTS M-LOK RAIL SECTIONS & ACCESSORIES
7075-T6 ALUMINIUM BARREL NUT
RAIL LENGTH IS MEASURED ALONG THE TOP
INNER DIAMETER: 1.36"
Charging Handle:
Tried and True Standard Charging Handle
Forged 7075 Aluminum construction
Mil-Spec Type-III Hardcoat Anodized finish
Caliber - .223 / 5.56 / 300 Blackout
Made in the USA
Please Note: Uppers may present light fouling from our quality control process and/or test firing
SKU: RTB18R55615JL-BLK
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