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

Rated 4.67 out of 5 based on 6 customer ratings
(6 customer reviews)

$329.00 $249.00

In stock

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This AR-15 upper assembly is made from the highest quality parts and is assembled in Charleston, South Carolina. The 12″ Hera Arms Keymod design features Picatinny at the 12 o’clock position with Keymod slots at the 3, 6, and 9 o’clock positions to mount your favorite accessories.

7075-T6 Aluminum
Mil-Spec Anodized Receiver
Pistol Length Gas Tube Assembly
16″ 300 AAC Blackout Barrel 
4150 Chrome Moly Steel Nitride Coated Barrel
Standard A2 Flash Hider
Twist Rate: 1:8
12″ Hera Arms Keymod Handguard/Rail with Picatinny

Check Out This Video That Features The 300 AAC Blackout

Additional information

Weight 2 lbs
Dimensions 16 x 11 x 2 in


Barrel Length


Twist Rate

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


    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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