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

MSRP: $129.00
Your Price: $89.95
(You save $39.05 )
(1331 reviews) Write a Review
Maximum Purchase:
10 units
Machined from 7075T6 Forgings
Stock Status:

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.***

1331 Reviews

  • 5
    Blem upper

    Posted by Rob on Feb 14th 2021

    Great upper. I just wish they were still $59.....

  • 5
    upper receiver

    Posted by Cal on Dec 20th 2020

    BCM is always my go to for the highest quality parts at a reasonable price. You can't beat it ..too bad everyone else found out about them also...availability is now the issue.

  • 5
    Upper reciever

    Posted by Danny on Dec 20th 2020

    Ordered a Blem upper. This thing is perfect!! Great service as always. Thank you for doing what you do!

  • 5
    If you catch these uppers in stock, buy it then.

    Posted by David Bunch on Dec 19th 2020

    Getting together parts for a build as a gift to a police officer, so can only rate it as a part as yet unused. Bought it as a scratch or demo knowing that there will be cerakote used later to cover any small blemishes. If it were to bad I would use it myself later. Opened the box and absolutely cannot find anything wrong with it. Got an extra barrel laying around and tried the fit with it, just by hand. The extension only went in part way letting me know that it will take a little heat to get the final barrel installed later. Wish now I had bought another one when I had the chance.

  • 5
    Scratch/Dent Upper

    Posted by Randy Furusho on Dec 18th 2020

    Can barely notice any flaws and a great deal. Needed a couple of uppers for a new MCMR project and what could be better than a BCM upper. Now I wish I should've maxed out my order to have a few spares.

  • 5
    Demo Upper?

    Posted by MikeD on Dec 17th 2020

    "Scratched" they said, looks brand new. If I got this in a blister package I'd have been happy with my new upper. Couldn't be happier.

  • 5
    "Blemished" Uppers

    Posted by Steve on Dec 17th 2020

    Bought two of these, and could only find one pin-tip sized blemish on one of them which was easy to Aluminum-Black, the other was flawless. Will have more wear marks from the first day at the range.

  • 5
    Blem upper

    Posted by Van on Dec 17th 2020

    I don’t see a thing wrong with either receiver I bought, they look real nice. The only reason I wouldnt buy a blem again would be if i had to have the BCM logo! These still have a raised star logo in the metal so you can see it’s a BCM product so that’s cool

  • 5

    Posted by Jayme on Dec 6th 2020

    Not a single ding nor scratch on this upper!