AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / 15″ CBC Arms Gen 3 M-Lok AR-15 Handguard / Rail

Rated 5.00 out of 5 based on 3 customer ratings
(3 customer reviews)

$347.00 $267.00

In stock

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


This AR-15 upper assembly is made from the highest quality parts and features the CBC Arms Generation 3 handguard/rail that is perfect for 3 gunners. The free float 15″ CBC Arms Gen 3 M-LOK  handguard/rail features a full-length Picatinny rail at the 12:00 position, and 3 integrated forward mounted 2.5″ Picatinny rails at the 3:00, 6:00, and 9:00 positions.

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
15″ CBC Arms Gen 3 M-LOK Handguard/Rail

 *Does Not Include Bolt Carrier Group & Charging Handle*

Additional information

Weight 2 lbs
Dimensions 16 x 11 x 2 in


Barrel Length


Twist Rate

3 reviews for AR-15 Upper Assembly – 16″ / 300 AAC / 1:8 / 15″ CBC Arms Gen 3 M-Lok AR-15 Handguard / Rail

  1. Rated 5 out of 5


    Having an itch to build my own AR I chose the CBC to support our Vets and the ‘Made in USA’ concept. I was extremely satisfied with the fit, quality of workmanship and function of this upper. After reading horror stories about other affordable uppers from other companies, I was a little apprehensive of what kind of quality I could afford. I have NO issues with this upper. It went right together on my Anderson lower. No tweeking needed. Fired straight. No function issues at all. The finish was perfect. I WILL buy from CBC again.

  2. Rated 5 out of 5

    Dan S

    Took it out with a new batch of reloads and rang the metal gongs immediately. Super accurate and worked flawlessly. Keep up the great work!
    2nd upper already ordered.

  3. Rated 5 out of 5

    Evan Bellamy

    This was my first upper from CBC. Without a doubt, it didn’t dissapoint in the slightest!! Accuracy, on point!! Supers and Subs….no problem!!! Function, feeding, and finish….damn good!! I’d say this upper can run with the best of them and for a hell of alot cheaper!! Spot on CBC….this upper is amazing!!

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