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

MSRP: $129.00
Your Price: $89.95
(You save $39.05 )
(1381 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.***

1381 Reviews

  • 5
    Blem upper

    My 2nd blem upper. Excellent quality. Upper looks perfect, can't find a blemish. BCM makes some great products.

  • 5
    BCM upper receiver

    For a demo these are really good shape. Always a tight fit. Very good product

  • 5
    M4 blemished upper receiver

    Absolutely the best quality around their blemishes are better than most companies as new receivers will buy more this is my third one

  • 5
    BCM® Upper Receiver - M4 Flat Top - DEMO

    Quality that I have become to rely on from BCM. This was a Demo/Scratched receiver that I inspected and could not find a flaw in it. I am very impressed with the quality control at BCM and that is what makes them one of the best weapon makers out there.

  • 5
    Blem upper

    The only upper to buy in my opinion. Fit perfectly with a BKF lower. Zero play.

  • 5
    Blem uppers

    If you get the chance to get these, get them. Couldn’t find a single scratch or wear mark. Only thing is maybe the under coat was a bit light… other than that I can’t find a blemish anywhere.

  • 5

    This receiver is great, they were kind enough to throw in a note explaining the blemish but no issues here! Near perfect condition. Will get more in the future!

  • 5
    BCM Blemished Upper

    I purchased this to complete a full BCM build. I was nervous being a blemished part but the reviews where great so I got one. It came quickly and I found the piece to be amazing. I couldn't find a single thing wrong with it. Looks just as good as any other upper receiver I previously purchased. Will definitely purchase again. Great work from BCM as always.

  • 5
    BCM Upper Receiver M4 Demo

    I have ordered several of these Demo models and they have all looked new w/o imperfections. And, of course, as per BCM's reputation they fit tight to the barrel and lower receiver.