BCM® Upper Receiver - M4 Flat Top (M4 Feedramps) Complete (Unassembled) - DEMO/Scratched

MSRP: $129.00
Your Price: $59.95
(You save $69.05 )
(1032 reviews) Write a Review
Machined from 7075T6 Forgings
Stock Status:

Out of stock


BCM® M4 Flat Top Upper Receiver with cosmetic blemishes. Most have scratches or scuffs.
The upper comes unassembled, but complete with BCM forward assist assembly and ejection port cover door assembly.
You must assemble it. (Assembly required) (all parts, but you will have to assemble together)
THESE ARE USED/DEMO UPPER RECEIVER ASSEMBLIES. All will have several nicks, scratches, and marks on exterior finish. NO HANDPICKING.
This receiver has the M4 feedramps machined in. This is to be used with barrels that include the M4 barrel extension.

Built to the correct Mil-Specs.
(Inside Diameter for barrel extension slightly undersized for a tighter fit to the barrel and a more accurate rifle. Please use a heat gun or hair dryer to warm up threaded bore of receiver if barrel extension is too tight.)


Precision machined to correct Mil-Specs from 7075 T6 Forgings
NOT Assembled with forward assist, and ejection port cover
Mil-Std 1913 Rail for mounting optics and accessories
Machined for use with barrels that use an M4 barrel extension
Laser etched T-markings for addressing the remounting of optics
Includes Mil-Spec Forward Assist with heat treated tool steel pawl, with press fit and pinned cap
Hard Coat Anodized per Mil-A-8625F, Type III, Class2
Dry Film Lube on interior bore per Mil-Specs
Made in the U.S.A. (of course)

This product will not include the BCM® logo laser etched on the receiver. It is marked BCM4 over the gas tube hole.

***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***

1032 Reviews

  • 5
    Demo/Blem upper

    Posted by Ike on Jun 24th 2020

    Slight risk purchasing this upper, risk was absolutely worth it. Could not find a single surface scratch or damage. Quality not compromised with this purchase.

  • 5
    BCM M4 upper

    Posted by Paul C on Apr 30th 2020

    This is my second or third BCM upper and they are fantastic values for the money. I couldn't find a blem when I received mine. Good, snug fit to barrel. I hope to buy more for future builds.

  • 5
    Excellent value

    Posted by Kyle on Apr 30th 2020

    I have used two of these now for builds. When they say heat needed to insert the barrel they aren’t kidding. My first one I had to stick the barrel in the freezer AND use heat on the receiver to get the barrel in. For $60 it’s totally worth it. Both my receivers the only blem I found was some discoloration, one had it more so than the other. No chips or dings. These are great if you want to rattle can, kote or if you just don’t mind the blem.

  • 5
    Tremendous Value

    Posted by JR on Apr 30th 2020

    They sell these as scratch/Demo pieces but nothing I could find on it would be objectionable at this price point. Barrel fit very tightly, hairdryer on the receiver and barrel in the freezer to get it together. Very satisfied and would buy more without question.

  • 5
    Excellent quality

    Posted by Steven Jenkins on Apr 30th 2020

    Description says DEMO/BLEMISHED but it looks better than any Anderson, or Luth-AR upper I have ever purchased. Instructions regarding heating the upper threads to fit the barrel are accurate. Pretty much had to do that. Assembly went remarkably smooth. It came with an upper parts kit and the forward assist roll pin was very tight. That was really my only issue the entire time I was building it! Fun project and I will definitely buy it again!

  • 5
    stripped upper-blemished

    Posted by Ralph Mieszala on Jan 6th 2020

    Upper looked perfect to me! Couldn't find blemish.

  • 5
    BCM Upper

    Posted by Jeremy on Jan 5th 2020

    Very good quality good tight fit to barrel p

  • 5
    M4 upper

    Posted by Don on Jan 2nd 2020

    Great product, shipped fast and is an excellent product and value.

  • 5

    Posted by John on Jan 2nd 2020

    Perfect fit. I don’t see any blemish on the receiver.