BCM® Standard 9" 300 BLACKOUT Upper Receiver Group w/ MCMR-8 Handguard

MSRP: $984.50
Your Price: $731.45
(You save $253.05 )
(27 reviews) Write a Review
300 BLK
Barrel Length:
Barrel Style:
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BCM® 300 Blackout Upper Receiver Groups

Continuous taper barrel profile designed for optimal weight, balance, and performance.

Barrel profile fluted toward the rear near chamber area - Increases strength and heat dissipation.

Tapered barrel profile out front, for easier maneuverability.

No sharp handguard cap shoulder for improved barrel harmonics and improved accuracy.

Muzzle threaded in standard 30 cal (5/8x24).

Includes MCMR-8 Handguard

Includes MCMR-SM (MCMR Sling Mount)

Includes One 3" Picatinny Rail Section

Includes BCM® Comp Mod 1 - 762/300 BLK

BCM® has taken great care to ensure the best possible performance and interchangeability. However, due to the large operational range of 300 Blackout ammunition in the market place, BCM® cannot guarantee function will all ammunition types in all conditions. These barrels were designed to run with a carbine buffer with subsonic ammo and a H3 buffer with high velocity ammo. Fine tuning may be required in limited instances based on ammo and buffer choices that work best for the desired application. BCM® also recommends running the Crane O-ring (provided with all BCM® Bolt Carrier Groups) over the extractor with 300 Blackout.

  • Caliber: 300 Blackout
  • Barrel Length: 9"
  • Barrel Material: 11595E Spec Steel
  • Barrel Finish: Manganese Phosphate (Mil-Spec A-A-59267)
  • Bore & Chamber: Chrome Lined
  • Weight: 2.2 lbs
  • Twist Rate: 1:7
  • Gas System: Pistol
  • Muzzle Device: BCM® Comp Mod 1 (762/300BLK)
  • Muzzle Threads: 5/8x24
  • Handguard: MCMR-8

Copyright 2017 Bravo Company MFG, Inc.
***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.***

27 Reviews

  • 5
    Customer review

    Posted by Dustin Toney on Oct 26th 2019

    Review body is empty

  • 5
    Purchased upper

    Posted by anonymous on Oct 8th 2019

    ordering was easy, clicked on what I wanted and it arrived a few days later with a few added sticker and posters.

  • 5
    Customer review

    Posted by Richard Sweeny on Sep 24th 2019

    Review body is empty

  • 5
    Customer review

    Posted by KRISTOPHER DIMAURO on Jul 22nd 2019

    Review body is empty

  • 5
    Customer review

    Posted by Paul Petras on Jul 17th 2019

    Truly awesome.

  • 4
    Product looks and functions great.

    Posted by Jeff Edwards on Jul 17th 2019

    Only part I would change is choosing of a muzzle device. Don't remember there being a good description of what the devices are designed to do. Kinda leave ya guessing on what ur getting.

  • 5
    Fantastic upper

    Posted by anonymous on Jul 17th 2019

    Upper performs flawlessly. I love how light weight it is. The M-LOK rail is great; it is nice and slim and therefore easy to grip, and saves weight because you only attach rail sections where you need them.

  • 5
    Customer review

    Posted by Mike Avens on Jul 17th 2019

    Works perfect. 600 rounds of 220 grain subs with a sandman s suppressor. No issues very light weight and accurate

  • 5

    Posted by John Rusyn on Jul 17th 2019

    I have been looking for a .300 BLK. upper for several months . I done the reading , asked the forums and reviewed the top tube video.
    Went with the BCM and can't be happier!. First at the unboxing the fit and feel is fantastic. A totally solid and well made piece of iron.
    For range placed on a SBR lower and ran flawlessly with 220 grain subs. Switched out the muzzle brake which worked great, so it would accept my Surefire 300 SPS can also switched to a H2 buffer and continued to run with the 220 gain subs . And ran without a hiccup . My Mk 18 is going back into the safe. This has become the truck gun and my go to rifle. Thank you BCM for a rifle I can be proud of and depend on without question.