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AR-15 Upper Assembly – 16″ / 5.56 / 1:7 / Midlength / 12″ Keymod AR-15 Handguard / Rail

Icon - 5.56 NATO AR CaliberIcon - 1:7 Twist RateIcon - 16 AR Barrel
(5 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.



Stock Status: Available for Immediate Production

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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.

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. 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” 5.56 Melonite Barrel Chrome Moly
  • Twist Rate: 1:7
  • Feed Ramps: M4
  • Gas Block: Steel .750 Low Profile
  • Gas Tube: DGI Stainless Mid-Length
  • Muzzle Device: Steel A2 Style Flash Hider
  • Rail: 12″ Keymod
  • 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″ / 5.56 / 1:7 / Midlength / 12″ 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.

➲ Midlength Gas Tube

An essential component to your AR15 is the gas tube, which keeps your build up and running. This mid-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.

➲ 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.

➲ SOCOM Contour 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 the SOCOM Contour is similar to the standard M4 Contour, but has a more streamlined appearance. This barrel offers a 1:7 twist rate, that is capable of stabilizing virtually any 5.56 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!

Additional information

Weight 4.95 lbs
Dimensions 27.5 × 4.5 × 4.5 in

Barrel Length


5 reviews for AR-15 Upper Assembly – 16″ / 5.56 / 1:7 / Midlength / 12″ Keymod AR-15 Handguard / Rail

  1. William tolli

    I have this upper on a aero precision lower I built . Fit and finish is absolutely perfect with little to no play . 1moa or less at 100 yards . Have over 700 rounds with this upper and have experienced no issues. 100% recomend. Great company

  2. Dan Tatman

    I wanted to wait until I had some range time to write this review. Once I had this upper in hand upon inspection, I did notice 1 small blemish on the rail. The rest of the upper was very nicely assembled and clean. Gas assembly was sturdy. The dust cover however looked like it’s finish is defective. Looks egg shelled. The upper fitted snug with my KE lower and my SAA nickel boron bcg fit without a hitch. At the range, I broke the barrel in using approx 100 rounds. The first 5 were factory and the rest were reloaded 62grain fmj. The first 5 factory rounds chambered and fired correctly. Had 4 or 5 rounds get stuck with the reloads during the first 15 rounds. Everything fired no problems after that. So far, for the price, very nice budget upper.
    Now the bad. CBC does not notify of progress with the build status. Even when I called, had no real real faith in the progress stated. I received my upper and a hour after that had a tracking number finally sent to my email. I could have been out of town and never knew the upper was sitting on my porch. That is unacceptable. I believe the only reason I had a tracking number sent, was my son called to cancel his order if he didn’t get his tracking number by close of business. Our orders were somewhat tied as we have same shipping address. This is why I only gave 4 stars. If CBC gets their customer contact operation in order, I’d have no problems ordering again, I like the product they built me.

  3. joel

    good upper if you are looking for something on a budget that can still get the job done. some slight cosmetic blemishes (which i dont really care about) but other than that nothing major was wrong with the upper.

  4. Janny

    Searched the net for an complete upper and kept coming back to this one. Glad I purchased it. Ordered on a Sunday night and got it on Friday! Fit great on my Aero lower. Shoots great! When I build another AR I will purchase another one from here.

  5. jarrodgilliam13 (verified owner)

    I was hesitant to purchase this at first due to some of the negative reviews online. Most the online reviews claimed poor customer service and long delays in shipping times. These reviews could not have been more wrong in regards to my experience. I ordered this upper on Monday and I received it on Thursday. Not only that, I also sent an email asking a question about shipping times and I had a response the next day. Now for the upper itself, it without a doubt passes the visual test. The finish looks great and I did not see any blemishes. It fit perfectly with a PSA lower, and while I have not made it to the range yet, so far I am incredibly happy with my CBC experience. I have already recommended to numerous friends and I will definitely buy from them again in the future. Plus if you need one more reason to buy from here, the entire company is run by veterans and the guns themselves are assembled by veterans. Would rate it 6 stars if I could.

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