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Nickel Teflon Upper Receiver (M4 Flat Top) - Complete ***BLEM***

M4 Flat Top Blemished Nickel Teflon AR-15 Upper Receiver

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Our Price: $179.00
SALE PRICE: $99.99
Savings: $79.01


Stock Status :(Out of Stock)

Product Code: NTUS-BLEM

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See "CHART A" tab below:

Description CHART A

Complete Nickel Teflon Upper Receiver (M4 Flat Top) w/ Blemishes

Electroless Nickel Teflon has continually proven to outperform traditional Anodizing and Phosphate coatings by leaps and bounds! The increased reliability, corrosion resistance and ease of maintenance make this upgrade a no-brainer.

PLEASE NOTE: These uppers are being sold at a discounted rate due to minor imperfection in the base metal. These imperfections are very common but are usually hidden when anodized. Nickel Teflon does not hide them as well. In no way shape or form will these blemishes affect functionality.


  • Forged & machined by Cerro Forge (Key Hole)
  • Machined From mil-spec 7075 T6 forging
  • M4 feed ramps
  • Proprietary electroless nickel teflon finish
  • 100% increase in corrosion resistance compared to MIL-A-8625 hard coat anodizing
  • 240% increase in lubricity compared to MIL-A-8625 hard coat anodizing
  • 160% increase in lubricity over hard chrome

Nickel Teflon will buff out and produce polished spots on contact/friction points. When using a clamshell type receiver block, the contact points may cause slight discoloring on the exterior of the receiver. This of course is strictly cosmetic. However, if you're trying to avoid discoloration then we recommend using a (pin type) receiver vise. The inside diameter for barrel extension is slightly undersized for a tighter fit to the barrel and a more accurate rifle.


  • Run it longer and harder - Lubrication optional. If you decide to use lube you won't notice when it dries up. The natural lubricity of Nickel Teflon has a much lower coefficient of friction than phosphate treated steel with lube applied.
  • Lubricity and wear resistance - Lubricity plays an essential role in optimizing wear resistance and longevity. Nickel Teflon has a .05 Coefficient Of Friction (COF), creating a surface more slick than Anodizing, Hard Chrome or even Nickel Boron.
  • Longevity - Has a Hardness of Rockwell 54. Guaranteed not to peal or flake
  • Ease of maintenance - No scrubbing required. Carbon fouling literally just wipes off with a rag.
  • Corrosion resistance - We apply a proprietary Electroless Nickel substrate with a higher than average phosphorus content, giving the coating a barrier that's practically impenetrable by corrosion.

Have us engrave your port door. Choose one of our 26 graphics from the drop down menu. See reference "CHART A" tab above.

Average Rating: 5 of 5 Total Reviews: 161 Write a review »

  0 of 0 people found the following review helpful:
Nickel Teflon m4 upper July 10, 2019
Reviewer: Andrew Enriquez from CA United States  
Happy with purchade. Smooth cycling. Paired with Nib B.C.G. smooth like glass.

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  0 of 0 people found the following review helpful:
Build every gun with this. June 21, 2019
Reviewer: Jamison Emilio from Pflugerville, TX United States  
This product is incredibly sexy and high quality. The coating is sleek and uniform with the added bonus of being on forged 7075. Doesn't get any better than this. I couldn't even find the blemish.

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  0 of 0 people found the following review helpful:
What Blem? April 3, 2019
Reviewer: Walt from Socialist Republic of Oregon  
I looked hard to find a blem and couldn't find one. I used this for a build for my better half and the total weight for the build is just under 5 pounds with mag. Faxon 16" pencil barrel, RTB light weight BCG, carbon fiber handguard, and a skeletAR 80% lower with a Hiperfire trigger group and some sundry titanium parts thrown in for good measure. Just got back from range from first time out and this thing is a tack driver. Worst group was just over 3/4 in. 5 shots. Thanks RTB! great prices, great products, and fast shipping

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  0 of 0 people found the following review helpful:
good part, great price March 11, 2019
Reviewer: Matthew from RI US  
As many have said before part is great, can't find blem. Not a problem, got this part to put on shooter, not look pretty in safe.
RTBA shipped super fast. Ordered Wed AM, rec Fri afternoon, 1200 miles away. Get yours while U can.

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  0 of 0 people found the following review helpful:
March 4, 2019
Reviewer: Anonymous Person from Fruita, CO United States  
Couldn't see anything wrong, supposed to be a blem. Love the slickness! Ti-N BGC slides easily without any lube!

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