This AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 16 inch, 4150 chrome moly barrel that is chambered in 5.56 NATO and has 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. This upper comes with back up iron sights.
Outfitted with a 15″ Gen 2 Keymod Rail that features a seven-sided keymod design, resulting in 200% more attachable surface area of a standard keymod rail. The rail also features a full-length picatinny top rail that sits flush with the upper receiver and has anti-rotation tabs to keep it locked in place. This upper assembly comes with a standard A2 flash hider that effectively suppresses muzzle flash and protects the 5/8×24 barrel threads if you are planning on adding a muzzle break in the future.
- 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 A2 Flash Hider
- Twist Rate: 1:8
- 15″ CBC Arms Gen 2 Keymod Handguard/Rail
- *Does not include Bolt Carrier Group & Charging Handle
- Low Profile Square Shaped A2 Type Mil-Spec Front & Rear Sights
- Constructed from 6061 Aircraft Grade Aluminum
- Calibrated and matched together as a set
- Rear Sight: Windage Adjustable MOA Adjustment
- Front Sight: A2 Post Elevation Adjustment
Product Details: AR-15 Upper Assembly – 16″ / .223 | 5.56 / 1:8 / Sight 230-540 / 15″ CBC Arms Gen 2 Keymod AR-15 Handguard / Rail
➲ Carbine Gas Tube
An essential component to your AR15 is the gas tube, which keeps your build up and running. This 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 nitride finish, this 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.
➲ Upper Receiver
The foundation of all good AR's 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.
➲ 45 Degree Offset Sights
Even if you have a high-quality optic or scope on your rifle, it is important to have a set of back up iron sights mounted to your receiver and rail just in case your optic fails. This 45-degree flip-up rear and front sights are designed to stay out of the way when you don’t need it and quickly deploy when you do. It is precision machined from aluminum and features a matte black finish so you can be sure it won’t break or rust in harsh conditions. This backup sight is angled so you can quickly transition between your optic and iron sights depending on the situation. This style of canted iron sight is popular with 3 gun competition shooters who have to quickly change between long-range and close targets. It is quickly deployable via a positive lock button that, when depressed, locks the sight tower to prevent it from collapsing during use and locks in the folded position to keep it out of the way. The rear aperture is adjustable for windage via the tool-less adjustment knob and features two aperture types depending on your preference. The low-profile sight base attaches to 1913 picatinny rails. Ensure your AR-15 or AR-10 will keep you in the fight with these back-up rear and front iron sights.
➲ Keymod Handguard
Your AR-15 handguard has huge implications in terms of how much you enjoy your shooting experience. Our seven sided Keymod handguard is built to handle the hardest use and abuse of tactical and competitive shooting while offering more versatility than other handguards. It features a full-length picatinny top rail that sits flush with M4 flat top receivers allowing you to have more space for optics and back up iron sights. Due to the “7 sided design”, this rail has more than 200% more attachable surface area of a standard keymod rail. This AR-15 handguard is machined from 6061 aluminum, has a hard coat anodized black finish.
➲ 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 shooter\\\\\\\\\\\\\\\'s night vision by disrupting the muzzle flash when firing in low lighting 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 and save with free shipping!