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AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / 15″ CBC Arms Gen 2 Keymod AR-15 Handguard / Rail

Icon - 300AAC Blackout AR CaliberIcon - 1:8 Twist RateIcon - 16 AR Barrel
Rated 4.71 out of 5 based on 7 customer ratings
(7 customer reviews)

This AR-15 upper assembly is a complete Generation 2 upper assembly that features a 7 sided 15" CBC Arms Gen 2 Keymod Rail. In addition, this assembly is made from the highest quality parts and is assembled in Charleston, South Carolina. 7075-T6 Aluminum Mil-Spec Anodized Receiver Pistol Length Gas Tube Assembly 16" 300 AAC Barrel 4150 Chrome Moly Steel Nitride Coated Barrel Standard A2 Flash Hider Twist Rate: 1:8 15" CBC Arms Gen 2 Keymod Handguard/Rail *Does Not - [READ MORE BELOW]

$299.00 $199.00

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Stock Status: Available for Immediate Production

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Description

This AR-15 upper assembly is a complete Generation 2 upper assembly that features a 7 sided 15″ CBC Arms Gen 2 Keymod Rail. In addition, this assembly is made from the highest quality parts and is assembled in Charleston, South Carolina.

  • 7075-T6 Aluminum
  • Mil-Spec Anodized Receiver
  • Pistol Length Gas Tube Assembly
  • 16″ 300 AAC Barrel
  • 4150 Chrome Moly Steel Nitride Coated Barrel
  • Standard A2 Flash Hider
  • Twist Rate: 1:8
  • 15″ CBC Arms Gen 2 Keymod Handguard/Rail
  • *Does Not Include Bolt Carrier Group & Charging Handle*

Product Details: AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / 15″ CBC Arms Gen 2 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.

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 4.2 lbs
Dimensions 27.5 x 4.5 x 4.5 in
Platform

Caliber

Barrel Length

Rail/Handguard

Twist Rate

7 reviews for AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / 15″ CBC Arms Gen 2 Keymod AR-15 Handguard / Rail

  1. Rated 5 out of 5

    Josh L

    Let me start out by thanking CBC for getting this upper to me so quickly. This upper exceeded all my expectations for finish, operation and accuracy. It cycles every kind of ammo (super and subsonic) I fed it with near MOA accuracy from a sandbag and red dot.

    If you are on the fence about purchasing this upper, you definitely will not regret it.

  2. Rated 3 out of 5

    Lance

    Took the newly built rifle to the range. Three rounds in, it stopped ejecting spent cartridges. Looked at the side of the handguard and noticed a buildup of light brown material. Took the handguard off to check the gas block and gas tube, and the block had slide significantly. I could actually turn the top block screw with my finger it was so loose. I’m not sure how this could have been overlooked. Haven’t tested it out since tightening down the stews, but it appears to be fixed for now.

  3. Rated 5 out of 5

    Rob G

    Ordered two of these uppers and they are awesome. Only a 7 day lead time with fast 3 day shipping. The craftsmanship of this upper is perfect and the 15 inch CBC keymod forearm feels great. Can’t wait to get it out and shoot! Thanks CBC for the great product I will be ordering more soon.

  4. Rated 5 out of 5

    Jeff Rowe

    I received this upper assembly in a very timely manner and as soon as I opened the box and got the upper out to took the hand guard off so I could remove the barrel nut to apply anti-seize, I do this with all new assembled uppers. I was very impressed to find that they had already applied anti-seize on the threads. I have purchased 4 other uppers from other places, such as palmetto state armory, and not a single one had anything at all on them except for this one. Very pleased with this upper at 100yrds with a Nikon 223 scope and it repetitively shot groups that were sub MOA. I will be purchasing more upper assembly’s from CBC for sure.

  5. Rated 5 out of 5

    Cody Outz

    I ordered this upper just trying something new an man am I glad I did!! You can’t beat the price point and the quality of these uppers! I have shot all types and weights of ammo in this upper and all shoot well! Mine seems to really like the heavier bullets more than lighter. I’m am VERY pleased I went with CBC on this 300 BLK upper. I will definitely use their uppers on my future AR rifles. I will also add their customer service is 2nd to none!

  6. Rated 5 out of 5

    Rusty

    I have been interested in a 300 blackout upper for a while. Then a saw a a great deal from CBC Industries for a AR-15 Upper Assembly – 16″ / 300 Blackout / 15″ CBC Arms Keymod GEN 2 AR-15 Handguard / Rail × 1 could not pass up and placed a order. When it arrived and took it out of the box, I could not believe how light it was. I mounted it to a complete lower I already had built and loved how the slim rail felt in my hand. I mounted a Nikon 300 blackout scope and finally took it to the range a couple of weeks ago. After getting my scope sighted in at 50 yards I fired 125 grain,130 hog hammer and 147 grain bullets and was putting my bullets in the x ring every time. It was getting dark so I was not able to shoot 100-200 yards, but expect good results when I do. I had zero feeding or ejection issues with any of the ammo I used. The recoil was a little more than a 223 but a lot softer than I expected. I would recommend this upper to my friends.

  7. Rated 5 out of 5

    amohse7476 (verified owner)

    Wife finally wanted her own AR (tired of shooting mine). She shot my brother’s 300, and loved it. Built her a 300, and it was love at first “bang”. Upper is lightweight, fits her hands, and is, in her words, “beautiful”. Happy wife, happy life.

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