BCM Upper Receiver M4 Flat Top Complete (Unassembled) DEMO


Original price was: $129.00.Current price is: $99.00.



Inter-Store Transfer

If this item is out of stock at your local RifleGear but available at our other location, no problem. Just place your order and select In-Store Pickup as the shipping method. As long as the item is legal in your location, we will transfer the item for you. You will be notified by email once your item has arrived at the destination. DEMO BCM M4 stripped forged upper receiver with M4 feedramps, Built to the correct Mil-Specs. These upper receivers are blemished, however are in fully functional, working order. Includes forward assist and port door assembly, however it must be installed by the end user.
THESE ARE USED/DEMO UPPER RECEIVER ASSEMBLIES FROM BCM. All will have several nicks, scratches, and marks on exterior finish. NO HANDPICKING.
Note: 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.

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


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.