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

MSRP: $984.50
Your Price: $731.45
(You save $253.05 )
(31 reviews) Write a Review
300 BLK
Barrel Length:
Barrel Style:
Stock Status:

Out of stock

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.***

31 Reviews

  • 5
    Mechanically, Estetically, and overall WOW!

    Starting off with estetics, it looks incredible and feels like no other. The fit to my Aero Precision lower is uncanny and really precise. Mechanically, works better than perfect with standard 300aac blackout ammunition. I did run a few subsonic rounds, and the bolt locked back successfully on each shot. Right out of the box, all around perfect for me, I'm 5'4" 145lbs and this fits my CQB need very accurately. Also, it is very lightweight and absorbs recoil very well for it's size.

  • 5
    300 blackout.

    This barrel was used for a pistol build!! Love my new 300 blackout!! I only buy BCM uppers, the quality speaks for itself.This is easily my favorite gun! If this barrel is in stock, don’t hesitate, just buy it,! Thank You BCM for an amazing product!!!

  • 5
    300 blk upper

    Only shot 250 rounds through it so far, I'm very happy.

  • 5
    Complete upper receiver, 9" standard, 300blkout

    Quality upper right out of the box. Ran 110gr, 115gr, and 147gr in designated 300blkout magazines. No issues.

  • 5
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  • 5
    Purchased upper

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

  • 5
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  • 5
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  • 5
    Customer review

    Truly awesome.