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AR-15 Blemished Upper Assembly – 16″ / .223 | 5.56 / 1:8 / 12″ CBC Arms Keymod AR-15 Handguard / Rail

Icon - 5.56 NATO AR CaliberIcon - 1:8 Twist RateIcon - 16 AR Barrel
(3 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 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.

Description

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.

ar-15-upper-assembly-16-5-56x45-12-cbc-arms-rail

Outfitted with a 12″ 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.

  • Barrel: 16” 5.56 Melonite Barrel Chrome Moly
  • Twist Rate: 1/8
  • Feed Ramps: M4
  • Gas Block: Steel .750 Low Profile
  • Gas Tube: DGI Stainless Carbine-Length
  • Muzzle Device: Steel A2 Style Flash Hider
  • Rail: 12″ CBC Free Float Keymod Rail
  • Upper Receiver: Forged Upper Receiver
  • Upper Components: Mil-Spec Forward Assist, Mil-Spec Dust Cover, and Brass Deflector

Additional information

Weight 3.8 lbs
Dimensions 27.5 × 4.5 × 4.5 in
Platform

Caliber

Barrel Length

Rail/Handguard

Twist Rate

Condition

Blemished

3 reviews for AR-15 Blemished Upper Assembly – 16″ / .223 | 5.56 / 1:8 / 12″ CBC Arms Keymod AR-15 Handguard / Rail

  1. Troy

    I received my upper today. It had a clue of very small scratches but I’m gonna Duracoat it anyway. Strapped it to my lower and ran a mag through it. It’s AWESOME. The fit to my Anderson lower is super tight. No play at all. I will definitely buy another in the near future.

  2. Sam

    I have looked and I still cannot find the blemish on mine. I paired it up with a Del-ton Lower and I’m using a Del-ton charging handle and PSA Nitride BCG. The fit to the lower is snug, have not had so much as a hiccup with the 240 rounds I put through it. Great accuracy as well. You cannot beat CBC’s quality for this price. Thanks again CBC!

  3. 440carter (verified owner)

    Looked the upper over and I’m not sure where the blemish is, I paired mine with a spikes tactical lower and a CBC BCG it doesn’t seem to have any problems with running rounds down range. Great upper for the price..

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