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AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / 12″ CBC Arms Keymod AR-15 Handguard / Rail

Icon - 300AAC Blackout AR CaliberIcon - 1:8 Twist RateIcon - 16 AR Barrel
Rated 4.67 out of 5 based on 6 customer ratings
(6 customer reviews)

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 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.

$299.00 $199.00

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Stock Status: Available for Immediate Production

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Description

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 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.

ar 15 upper assembly 16 300aac 12 cbc arms rail

Outfitted with a 12″ 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 and picatinny inserts at 3:00, 6:00 & 9:00 position to increasing the functionality and providing multiple attachment points. 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.

  • Barrel: 16”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: 12″ CBC Free Float Keymod Rail
  • Upper Receiver: Forged Upper Receiver
  • Upper Components: Mil-Spec Forward Assist, Mil-Spec Dust Cover, and Brass Deflector

Product Details: AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / 12″ CBC Arms 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.

➲ Keymod Handguard

Your AR-15 handguard has huge implications in terms of how much you enjoy your shooting experience. Our Keymod handguard offers more than just the accuracy enhancements that come with a free-floating rail. 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. The slim profile is comfortable to grip while still allowing enough room for low profile gas blacks underneath. This AR-15 handguard is machined from 6061 aluminum, has a hard coat anodized black finish, and the strong attachment of accessories to the Keymod handguard are unaffected by recoil.

➲ 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. 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. 

➲ 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!

Additional information

Weight 4.6 lbs
Dimensions 27.5 × 4.5 × 4.5 in
Platform

Caliber

Barrel Material

Barrel Coating

Barrel Length

Twist Rate

Thread Pattern

Gas System Length

Rail/Handguard

Handguard Length

12"

Bolt Carrier Group & Charging Handle

No Bolt Carrier Group & Charging Handle

6 reviews for AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / 12″ CBC Arms Keymod AR-15 Handguard / Rail

  1. Rated 5 out of 5

    Kelvin J. Daniels

    I have gotten several of these and people tell me all the time how Bad A** they look! Not that looks are as important as function but when it looks great and shoots even better then you are winning!

  2. Rated 5 out of 5

    Jason H.

    I have never heard of this company until I went to Upstate Armory in Simpsonville, S.C. The price, quality and overall product is excellent. Looking forward to getting more of your products.

  3. Rated 5 out of 5

    Gary Claer

    I bought a 300 AAC upper when CBC Industries was in their infancy. Great people to deal with. The product they are producing are top of the line. I’ll be buying more in the near future. Their techs are awesome.

  4. Rated 5 out of 5

    Lloyd

    Great finish, beautiful .300 AAC upper. Used on Anderson stripped lower and was the tightest to a lower ive ever built no rattles or slop whatsoever. Functioned flawless with standard carbine buffer and spring. Grouped very well with 2-7×32 Nikon scope.

  5. Rated 3 out of 5

    Cliff Burnett

    I was disappointed to Recieve my upper today to find that the hand rail and upper Reciever was not aligned. It was an easy fix with a vice removing the screws and twisting it in place. But why should I need to do this. This is easly done right the first time or caught by quality. You should step it up if you are going to represent the great state of SC.

  6. Rated 5 out of 5

    John Beckman

    Awesome upper. Very accurate. Cycles like a champ. Done a lot of research and pricing before landing here at CBC. Very glad I did. Will be recommending your product to all my friends.

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