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

MSRP: $149.00
Your Price: $119.00
(You save $30.00 )
(103 reviews) Write a Review
Maximum Purchase:
5 units
Stock Status:

Out of stock


Professional Grade Weaponry

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.***

103 Reviews

Write a Review
  • 5
    Stripped upper

    Posted by jonguyen on Apr 10th 2019

    Excellent service. Thank you BCM.
    Fast shipping and stripped upper receiver is very clean and looks great

  • 5
    Top Quality

    Posted by Samu Tabar on Apr 10th 2019

    Fit, Finish and quality is top notch, not to mention the price...waited for month's to get this in stock ...highly recommended

  • 5
    Top Quality

    Posted by Stephen Fitzpatrick on Apr 10th 2019

    If you are looking for an excellent upper for your battle rifle. Look no further.

  • 5
    Customer review

    Posted by stephen armstrong on Apr 10th 2019

    This is my first Bravo Company purchase and I am very happy with it. This is an upper that I purchased for an AR build I'm doing right now and I'm very happy with it. Also shipping time frame was much faster than expected. I think the only thing I would like to see from you guys as I do expect to purchase much more from you in the future is different shipping options with a free shipping option for a certain dollar amount order.

  • 5
    Customer review

    Posted by Peng Pha on Apr 9th 2019

    Review body is empty

  • 5
    M4 upper

    Posted by Chris Wenzel on Apr 9th 2019

    I was wanting to build an ar and did a lot of research and everything pointed me towards BCM, and I couldn’t be happier. Besides a stripped lower and silent captured spring all components are from BCM. Great products, great pricing, and by far the best shipping around. I will continue to buy BCM products as long as I can.

  • 5
    Simply the best

    Posted by Richard on Apr 9th 2019

    This is being used for my first time build.
    90% of the parts used on this build is BCM.
    All have been first rate.. The upper and lower lock up tighter than my Colt 6920.
    If I had to actually fin something negative. I guess
    it would be, I wish it had BCM's Logo printed on it,
    Like there rifles do..

  • 5
    Customer review

    Posted by Scott Seidlitz on Apr 9th 2019

    Review body is empty

  • 5
    These have the tightest bore-barrel extension fit.

    Posted by Stuart Wright on Apr 9th 2019

    If you want to build an accurate rifle you need this upper receiver. The only ones I have ever found other then BCM that are tight fitting were Mega Arms upper receivers.