This AR-15 Upper Assembly features 16 inch 5.56 Colt Competition 4150 chrome moly barrel with a black nitride finish. The upper receiver is a forged M4 flat top upper, allowing you to easily attach rifle scopes and red dot sights to the picatinny rail. It is outfitted with a 12″ Keymod handguard that features strong attachment points for accessories resulting in accessories and optics having an excellent return to zero capability when detached and reattached.
- 7075-T6 Aluminum
- Mil-Spec Anodized Receiver
- Carbine Length Gas Tube Assembly
- 16″ 5.56 NATO Barrel
- 4150 Chrome Moly Steel Nitride Coated Barrel
- Standard Flash Hider
- Twist Rate: 1:8
- 12″ Handguard/Rail
- *Does Not Include Bolt Carrier Group & Charging Handle*
Product Details: AR-15 Upper Assembly – 16″ / 5.56 NATO / 1:8 / 12″ CBC Arms Keymod AR-15 Handguard / Rail
➲ M-LOK Handguard
New for 2022, these AR-15 handguards are built to provide rugged, reliable performance. Designed with the advanced shooter in mind, these handguards are light and ergonomic, features that provide faster on-target performance and reduced fatigue. Includes robust steel mounting hardware to ensure an easy installation and a rock solid platform.
➲ Upper Receiver
The foundation of all good ARs is built upon a dependable upper receiver. CBC upper receivers offer best-in-class quality while providing you years of dependable service. Boasting a MIL-SPEC type III hard coat anodized finish and machined from 7075-T6 forged aluminum, this M4 flat-top receiver delivers a lifetime of superior function. You want your AR built upon a solid platform - this receiver gives you the confidence that your AR-15 will function when it counts most.
➲ Carbine Gas Tube
An essential component to your AR15 is the gas tube, which keeps your build up and running. This carbine-length gas tube is constructed from corrosion resistant stainless steel ensuring a lifetime of service.
➲ .750 Low Profile Gas Block
The gas block is a critical link in the chain that is too often overlooked. This component ensures that your AR runs reliably. Made from high-quality steel with a smooth phosphate finish, this .750 low-profile gas block is efficiently designed to stay put with the percussion of gunfire. With its low profile this gas block allows it to fit under the most ergonomically designed handguards and rails on the market.
➲ Colt Competition Style Barrel
The barrel is one of the few components that directly affect the accuracy and weight of your build. This barrel has a nitride finish for increased strength and durability. While featuring a special contour that is designed to be lighter than a conventual SOCOM barrel giving you that extra edge when shooting 3-gun competitions. This barrel offers a 1:8 twist rate, suitable for both heavy and light ammunition. It is corrosion resistant resulting in an extended barrel life that is longer than conventional chrome lining. Thus, being the perfect barrel for long distance shooting, competitions, hunting and practically any shooting application you’ll subject your AR-15 too.
➲ A2 Flash Hider
The muzzle device is designed to perform a specific task, like suppress flash intensity or reduce felt recoil. This A2 Flash Hider is machined from quality steel and finished with an exceptionally corrosion resistant salt bath nitride for a lifetime of service. It provides effective flash suppression that preserves the shooters night vision by disrupting the muzzle flash when firing in low light conditions. While its closed bottom with top and side ports offers reduced dust signature when shooting from the prone position while additionally acting as a compensator.
CBC provides a wide selections of AR-15 upper assemblies in a variety of styles and lengths - all partial AR-15 uppers are assembled with everything less the charging handle and bolt carrier group. Our partial upper assemblies offer quality and performance that will satisfy the most demanding shooter. Better yet, all CBC AR-15 uppers are custom built-to-order enabling us to provide you with the best prices you will find anywhere. The quality of our AR-15 uppers are backed by our Lifetime Warranty - if any CBC upper assembly becomes defective, we will repair or replace it at no charge. Get your AR-15 upper assembly at CBC today!
I’ve never assembled any gun parts before, but I’m pretty handy working on bicycles, and carpentry. I didn’t have any problem with this. You’ll need a torque wrench, vice block to hold the lower steady, and I used a Snap-On adjustable crow foot 3/8″ wrench for torqueing the barrel to the receiver.
I wasn’t able to find assembly instructions on this site, but these 2 YouTube videos really helped:
https://www.youtube.com/watch?v=MngN1Gfof5U&list=FLO2FKqjANhdVyBzpIcSA3Ug&index=1 -This guys barrel nut was 1-3/16″ not 1-1/8″
I put it on a Palmetto Arms lower, and it fit perfectly, the black anodizing was a flawless match.
I believe the barrel nut to be 1-1/8″ but the machining only allows for a narrow wrench. Most inexpensive crows foot or adjustable wrenches won’t fit the width. 1-1/8″ size will mar the anodizing a little, since the fit is so exact, you have to work the wrench into place. I found the adjustable crows foot wrench by Snap-On to be an easier choice, and a little more forgiving. (although expensive, the Snap-On brand has a narrow footprint)
Larry Franklin –
Easy to take an inexpensive wrench, such as open ended or a combo type and using a surface grinder, narrow the width to fit. Shadetree mechanic milling machine!
Lawrence -Retired Equipment Shop Foreman
ASE Master Tech (for 1 more year)
E1-3, A1-A9, T1-T8, H2,T2- T7.