BCM® M4 Upper Receiver Assembly (w/ Laser T-Markings)

MSRP: $149.00
Your Price: $129.00
(You save $20.00 )
Stock Status:


Life Saving Tools

BCM® M4 Upper Receiver Assembly (w/ Laser T-Markings)

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 extension, providing the user with superior strength when dropped or when mortaring malfunction clearance drills.

Fully 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

As with all BCM® products, Made in the U.S.A.

***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.***

139 Reviews

  • 5
    The quality I've come to expect

    BCM has yet to disappoint. The quality in fit, form and function of every part has exceeded my expectations with every part.

  • 5

    Great quality and finish, flawless just like always.

  • 5
    Very tight tolerances....

    Nice finish and there is no doubt it is robust. Feels and looks like quality stuff for sure. Definitely had to heat the upper to get the barrel extension to fit. Was a little disappointed that the rear pin will not go into my Larue billet lower without a fight. Probably just need to work off some material but the upper easily fit a Wilson Combat billet lower but there is some play there. I don’t feel like that’s the upper at all.

  • 5
    Customer review

    Review body is empty

  • 5
    Best of the best!

    I have always used BCM Handguards always perfect but the rail on my uppers were always a little narrower, so this time I got a BCM Handguard and upper, finally the perfect match. I will never buy anything else. Bravo company all the way!

  • 5
    High Quality Product

    When you want a receiver to be right every single time and not wonder whether or not QA/QC received to attention, buy a BCM receiver. I couldn't be happier. BCM has a new customer here.

  • 5
    BCM M4 Upper

    BCM has quality products. The upper I received from them meets my demand for quality. I only wish they would sell stripped uppers, then I would be happier then a pig in a mud hole.

  • 5
    Customer review

    Upper receiver was a tight fit like it said, no issues after I heated it up like said too. I will buy from Bravo again!!!!

  • 5
    BCM Upper Receiver

    I put 5he BCM Upper Receiver in place where it goes and it fit like a glove. Fantastic product, great look, great quality, great style and most of all it functions great.