This AR15 upper receiver assembly comes ready to attach to any Mil-Spec lower receiver. It is built around a 10.5 inch, 4150 chrome moly barrel that is chambered in 300 Blackout 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.
Outfitted with a 10″ 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 compensator that effectively suppresses recoil and protects the 5/8×24 barrel threads if you are planning on changing the muzzle break in the future.
- Barrel: 10.5″ Melonite Barrel Chrome Moly
- Twist Rate: 1/8
- Feed Ramps: M4
- Gas Block: Steel .750 Low Profile
- Gas Tube: DGI Stainless Pistol-Length
- Muzzle Device: CBC Compensator
- Rail: 10″ CBC Arms Gen 2 Free Float Keymod
- Upper Receiver: Forged Upper Receiver
- Upper Components: Mil-Spec Forward Assist, Mil-Spec Dust Cover, and Brass Deflector
Please Note: An “AR-15 Pistol” upper assembly has a barrel less than 16” in length. Pistol uppers are only for use on AR-15 pistol lowers and legal Short-Barreled Rifles. Other configurations may violate Federal law. Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.
Product Details: AR-15 Upper Assembly – 10.5″ / 300 AAC / 1:8 / CBC Compensator / 10″ CBC Arms Gen 2 Keymod AR-15 Handguard /Rail
➲ 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.
➲ Pistol Length 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.
➲ 300 Blackout Barrel
The barrel is one of the few components that directly affect the accuracy and weight of your build. This barrel has a parkerized finish for increased strength and durability. This provides not only an impressive barrel life but ensures excellent accuracy. This barrel is optimized for stability with a 1:8 twist rate, making it the perfect match for the 300 Blackout caliber.
➲ AR15 Muzzle
Not all muzzle devices are created the same. There aren\\\\\\\'t many muzzle brakes and compensators that \\\\\\\'understand\\\\\\\' proper high-pressure gas dynamics. This AR-15 Muzzle Brake has a three chamber design that significantly reduces muzzle rise. It has 5/8x24 threads, so you can attach it to your favorite 5.56 or .223 barrel and finally finish that build you have been working on. It is made from high-quality steel and features a durable nitride finish that will look great on any AR build.
➲ 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, and comes with a proprietary barrel nut and mounting hardware.
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!