RTB 16" 5.56 Upper Receiver - Flat Dark Earth | A2 | 15" M-LOK | Without Bolt Carrier Group and Charging Handle
This 16 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 making the action smooth and easy to keep clean.
- 16" 5.56 4150 CMV Barrel - Black Nitride
- M4 Carbine Profile - .750" GB Journal
- 1:7 Twist Rate - 1/2x28 Muzzle Thread
- Machined from a Mil-Spec 7075 T6 forging
- M4 Feed ramps
- Cerakoted in Flat Dark Earth
- Made in the U.S.A.
- MATERIAL: HARD COAT 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