NOTE: Images may not be an exact representation of the product.

AR-15 Upper Assembly – 16″ / 5.56 NATO / 1:8 / 15″ Keymod AR-15 Handguard / Rail

Icon - 5.56 NATO AR CaliberIcon - 1:8 Twist RateIcon - 16 AR Barrel
(7 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 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.



Out of stock

If you are a dealer, please log in to your account to see dealer pricing.


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 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.

  • 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 Flash Hider
  • Twist Rate: 1:8
  • 15″ Keymod handguard/rail
  • Does Not Include Bolt Carrier Group & Charging Handle

Product Details: AR-15 Upper Assembly – 16″ / 5.56 NATO / 1:8 / 15″ Keymod AR-15 Handguard / Rail

➲ CBC Keymod Handguard

New for 2020, these AR-15 handguards are built to provide rugged, reliable performance. Designed with the advanced shooter in mind, these handguards are both sleek and ergonomic in the hand and that translates into faster on-target performance and ease of use. These AR handguards provide Keymod slots for mounting attachments and feature robust steel mounting hardware to ensure an easy rock-solid installation.

➲ 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.

➲ Carbine Gas Tube

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

➲ 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 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 5.2 lbs
Dimensions 27.5 × 4.5 × 4.5 in

Barrel Length


7 reviews for AR-15 Upper Assembly – 16″ / 5.56 NATO / 1:8 / 15″ Keymod AR-15 Handguard / Rail

  1. Jason K.

    I couldn’t be happier with this upper! At this price I think it’s a steal. It feels very comparable to the BCM uppers in this configuration and for 1/2 price. I will be ordering another one for sure.

  2. Brandon

    Overall, the upper seems to be put together well. It matched up sweet to my lower build. I’m waiting on a couple more things before I can do a full function test. My only complaint thus far is the left side of the receiver has some superficial pitting/scuffing, and there are two very fine lines or maybe scratches running the length of the receiver on the left side. Maybe forge marks? There is also a very small nick in the top rail, left hand side. (T21). Again, superficial… (very small), but aggervating none the less. Customer service, has been great thus far. There was a problem with getting the Hera rails in from Germany on my original order. CBC changed it to their gen 2 rail (after my approval), and shipped it out asap. No complaints with the company… only minor with the product.

  3. Brandon

    My previous review was complete and brutally honest, but don’t it scare you away. The issues as previously stated weren’t enough to make me want to return it. (Superficial) I now have several rounds down range with no issues at all. Bottom line, this upper is solid. A great way to top off a build. I’ll use CBC for my next build.

  4. Matt Smith

    Thank you for this product! Beautifully manufactured! Love everything about it, customer service is on point as well! I was hard pressed to believe that people said that it was in the same quality range as BCM, but they weren’t joking! Well Done!!

    Next up, the function test!! More to come!

    A very satisfied customer!

  5. Gary Brooks

    I ordered this upper when they had the sale that included the BCG and Charging Handle. My only complaint was it took way longer to ship than was originally stated. Spoke with Chris at CBC and he got my order going. With that being said, I received and outstanding product. The upper was shipped like it was a part of Fort Knox! Thanks CBC! Have run about a 100 rounds through it with no problem. Will definitely buy again. Especially since I am now building a 300ac blackout.

  6. William Busch

    I am very happy with the quality of this upper. Put together very well Fit and finish is great. Packaging was really good and well protected. I have purchased expensive uppers from high end company’s and this is very close in quality. Can’t beat the price. I will be buying from CBC again

  7. Jeff Graham

    For my first ar build I searched and searched for a quality upper. After reading probably 1000 reviews on uppers I decided to give CBC Industries a try. Best idea I’ve ever made. The upper was packaged well and arrived on time. Also a tight fit when paired with a spikes tactical lower. No rattle what so ever. The only complaint is a few tool marks on the gas block but not noticable unless you point it out. Finish and alignment was flawless. Enough about the looks. How does it stack up against other ar’s? I compared this upper with a Core complete rifle ($1000 and a heavy barrel) and at 75 yards both rifles performed nearly the same, 30 rounds in 2.5 inch grouping. Here’s the difference, the CBC upper had a red dot 1x scope versus the Core with a 3-9x rifle scope. If you’re on the fence about what upper to buy…. Look no further. Add it to the cart and buy it now. These uppers are excellent. Not to mention they employee military veterans. Excellent price and a quality upper. Also, their gen2 keymod looks pretty sweet as well. What are you waiting for…. Buy one.

Only logged in customers who have purchased this product may leave a review.