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 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.
- Type: AR
- Finish Color: Black
- Caliber: 5.56 NATO
- Barrel Finish: Nitride
- Barrel Length: 16”
- Twist: 1:8
- Gas System: Carbine
- Muzzle: A2 Flash Hider
- Receiver Material: Aluminum
- Receiver: Mil-Spec, Forward Assist & Dust Cover Installed
- Rail: 15” Keymod
- Does Not Include BCG & CH
Product Details: AR15 Upper Assembly – 16″ / 5.56 NATO / 1:8 / 15″ CBC Arms Keymod
➲ CBC Keymod Handguard
New for 2020, these AR15 handguards are built to provide rugged, reliable performance. Designed with the advanced shooter in mind, these AR 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!
Jared Wilson –
Works great! Good quality upper that works great!
Get one of these uppers. The Hera key mod rail on this upper is sweet. It is very low profile and fits great in the hand. I don’t have very large hands but I can wrap my entire hand around the forearm with ease. I haven’t weighed it but it feels pretty light. I really like this upper.
Michael Owens –
Excellent quality with great looks. Normally I like building my own uppers for quality reasons but I have no regret buying this. Saved me time and money.
Phillip Barnes –
Very pleased with the quality fit and finish. Proved to be accurate moa shooter. Shipping was super fast. Like the 15 inch Hera rail with this 16 inch barrel.
Adam Kelly –
Absolutely gorgeous, sleek and lightweight. Fits my Spikes lower flawlessly. Installed a Spikes NiBo BCG and an ambidextrous Gunfighter charging handle and the thing as been running smooth as silk. Would buy again.
Garth Stocker –
I wanted a 15″ handguard for my build. Browsing around online, I wanted to avoid the big name companies and give someone else a try. Decided I liked the design CBC had for their rail, so I went with this. The barrel profile was also a plus. Went with my friends to try it out. Got my optic dialed in and am enjoying it. Has functioned flawlessly so far. Now, one thing my friends noticed right away, that I did not, was that the rail has some rough and sharp edges. And it sure does. It is most noticeable at the front, and around the quad rail sections at each end. The keymod cut outs are smooth on the outside, but have burrs on the inside. So, not a big problem, but seems like maybe they could use some bead blasting, time in a tumbler, or time with a file before being anodized. Besides that, the receiver, the barrel, and rail, are all fine products.
Aaron Billigmeier –
Thank you for the quality upper assembly. I was glad to have a knowledgeable person to work with on my order, it made ordering and selecting the right one a breeze. Thanks again
Anthony Solesbee –
I received this upper just days before Christmas. I bought it for a my friends wife who wanted to surprise her husband with a new AR. He had no idea what he was getting. But once He opened the present He was so excited and impressed with the quality and Craftsmanship put into this upper. This is not the first upper I have bought from CBC so I knew exactly what kind of quality item I was getting for him. My friend is almost ready to build the rest of the rifle. (has all the parts, just needs to pick up the lower). I can say from the other rifles I have built with CBC parts that they make great quality parts at a great price. Thanks guys.
JAMES KNOTTS –
JUST RECIEVED MY UPPER THIS MORNING AND WAS PLEASANTLY SUPRISED BY THE QUALITY FOR THE PRICE.
I HAD ORDERED THE HERA GEN2 LINEAR COMPENSATOR AS AN ADD ON AND WAS IMPRESSED THAT THEY HAD PREINSTALLED IT BEFORE SHIPPING THE UPPER OUT. SPOKE WITH CHRIS AT CBC WITH SOME QUESTIONS AND HE WAS MORE THAN WILLING TO TAKE TIME TO ANSWER THEM.
ITS HARD TO FIND QUALITY PARTS AND GREAT CUSTOMER SERVICE AT THE SAME PLACE. WILL DEFINITELY USE CBC ON FURTHER BUILDS.
Chris P –
When unpacking, a cursory look at the upper appeared to look great,closer inspection found several finish blemishes,also the upper receiver and rail were misaligned. The shop I bought my lower at aligned it for me. Alignment with my Phase 5 lower was perfect. Shooting at the range was flawless,so overall I am fairly pleased. Good product.
Larry Gaines –
When I received the package I was extremely pleased on how well the upper was double packed and cared for. After unpacking the upper I was even more pleased to see how well the upper was built. The entire upper appeared to have been made of good material and everything lined up flawlessly. The upper fit my Spikes lower very well with no issues. Not only does the upper look great, also weighs very light and not made of cheap thin material. After firing a few hundred rounds through it, I’ve had no issues and cant complain. Solid upper!!!! I give props to CBC Industries for producing a great upper. I’m already looking at 2 more uppers for rifles and possibly another lower for a pistol build.
Christopher Mayer –
Barrel is super scratched up from there assemble work. Muzzle is sharp and cut my hand like they made it and metal shavings all over it not a good job. But with a little cleaning its straight. Defiantly worth it for this price tho. These problems i dont care about but others might. And took 4+ weeks to arrive
Larry Chapman –
I was told the lead time on my upper would be 10-14 days, but I got a shipping notification exactly one week after I ordered. That was a Thursday, it arrived Monday, I was thrilled! Ordered a nice set of back up irons, and decided to bore sight them today, only to find that my .22 caliber adapter didn’t fit the barrel. Then I popped a mag in, and the round wouldn’t chamber. Turns out I got a 7.62×39 barrel, instead of 5.56. Five minutes on the phone, and I had a return shipping label. They goofed, but were very gracious about it, and I give CBC high marks for customer service. Hopefully they get it right this time.
bob dagner –
i ordered a 1/8 twist with a 16 inch colt htb barrel. it arrived in middle of heavy Styrofoam box inch thick.then put inside fitted heavy card board box.excellent protected and no movement possible.the upper was perfect no blemishes – scratches or thin spots.same for barrel . put it in a milled spikes lower spartan with built in trigger guard.locked up like a bank vault tight fit with no movement at all when pins put in.the rail was dead square with action. all screws and nuts were properly tight.ran brush threw it with barnes cleaner10 times.used 223 Israeli all brass 55 grain military ammo.was getting the nicest quarter sized groups at 50 yards with the open metal sights.. i am totaly blown away with the quality and accuracy.i am crabby old fart that almost never writes recommendations.to get 5 stars and a great big grin out of me says this upper was really something great. caught it onsale and then their 30% off holiday sale.even at full price it was a steal. great buy
On Sept. 27th I wrote a, shall we say, not-so-flattering review. Without going into the details I was immediately contacted by Chris Putnam of CBC who sincerely wanted to know why I was unhappy. After determining that CBC dropped the ball on my order, Chris manned up and admitted CBC was wrong and went WAY out of his way to make things right. This level of customer service is seldom seen in business today. I went from being disgruntled and dissatisfied to planning my next purchase from CBC. Oh, and by the way the upper I received is fantastic! Mates up perfectly with my Anderson lower and the fit and finish is flawless. Thank you Chris Putnam and CBC from a new, dedicated customer for life.
Well, this is my second order with CBC. The first was a 300 Blackout upper, and that was here in the blink of an eye, but this 5.56 upper took a little longer to get. I guess I can chalk it up to the fact that all of us “DEPLORABLES” want new toys, so that delay is expected. The rail was out of stock for my order, but CBC went above and beyond and upgraded me to the Hera Keymod rail and I couldn’t be happier. The fit and finish is perfect, I have nothing at all to complain about here. These guys are pros and go beyond to make their customers happy. See you again soon for something new!
I ordered a upper on 9/5/16 not knowing anything about cbc other than they had great prices.The build took a little longer than expected,due to no fault of their own,but while i waited i went to a local gun show.Every one i talked to had nothing but positive things to say about the quality of cbc products. As previously mentioned the build took a little longer than expected but the representatives i spoke to when calling for updates were always courteous and eager to help.When i got my upper this past friday i saw i had been upgraded to hera rail.the fit finish and quality are great.i would not hesitate to order from cbc again.
Took a much longer time to assemble and ship, but CBC upgraded to the hera rail due to a delay on parts delivery – that’s putting the customer first. The upper was packaged in a bomb proof box / foam combination and arrived within 2 days of being shipped. The fit and finish of the upper is flawless and resulted in a very nice build comparable to $1500 plus ar’s for much less by sourcing individual parts based on individual quality. The barrel is fitted to the upper perfectly and the nitride coating is phenomenal. I will definitely use CBC again for a pistol build. Thanks!
B. O’Haire –
I am not a “review guy “normally, but I felt I need to post to let other consumers know. I purchased this upper and couldn’t be happier. On the website it said to expect a 3 week delay due to production. I had the upper shipped and delivered within a week and a half. The upper is lightweight, thin, and very well made. Just as advertised. This is my second purchase with CBC and there will be more to come!
Ivan Olan –
I have gone through 2000 rounds of 5.56 so far and has never malfuntioned. I recommend this upper due to its hybrid style rail.
Joshua R –
For this price i have found it very difficult to find quality barrels like this on the web some of you all may be skeptical because CBC isn’t mainstream but i can assure you this product is triple A status Quality parts flawless craftsmanship you will not be disappointed. Save your money from overpaying when you can pay a good price and get a product which should cost a lot more.