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 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. In addition, this upper assembly comes with 45-degree offset sights, making it ready to take to the range.
Outfitted with a 15″ Keymod Rail that features strong attachment points for accessories resulting in accessories and optics having an excellent return to zero capability when detached and reattached. 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 1/2×28 barrel threads if you are planning on adding a muzzle break in the future.
- Barrel: 16” 300 AAC 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: Steel A2 Style Flash Hider
- Rail: 15″ CBC Gen ll Free Float Keymod
- Upper Receiver: Forged Upper Receiver
- Upper Components: Mil-Spec Forward Assist, Mil-Spec Dust Cover, and Brass Deflector
- *Does Not Include Bolt Carrier Group & Charging Handle*
- T6 6061 Grade Aluminum
- Tactical 45-degree Offset Flip Up Iron Sights Front & Rear
- Flip Up Posi-Lock Design to Guarantee Zero
- Front Slight A2 Post With Elevation Adjustment
Product Details: AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / Sight 230-540 / 15″ CBC Arms Gen 2 Keymod AR-15 Handguard / Rail
➲ 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.
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. This provides not only an impressive barrel life but ensures excellent accuracy. The barrel threads are carefully threaded to the .308 standard. Optimized for stability with a 1:8 twist rate, this 300 BLK barrel can handle heavier bullets used for subsonic loads with ease.
➲ 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.
➲ Pistol Length Gas Tube
An essential component to your AR15 is the gas tube, which keeps your build up and running. This gas pistol-length 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.
➲ 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 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.