BCM® Standard 9" 300 BLACKOUT Upper Receiver Group w/ KMR-A7 Handguard

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

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 KMR-A7 KeyMod™ Handguard.

Includes KMSM (KeyMod™ 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: KMR-A7

Copyright 2015 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.***

23 Reviews

  • 5
    Unbelievable Upper

    Posted by Seth on Jun 24th 2020

    The quality of this upper is phenomenal. It is very sturdy, quite lightweight for being an upper, and the barrel is incredibly accurate with its 1:7 twist. I bought this for my build in 300blk, and it performs exceptionally well. I am beyond pleased with this purchase. With BCM, you definitely get what you pay for-- and it's worth it. This will last you a lifetime. Take care of it, and it will take care of you.

  • 5
    Great product, well built, and runs great

    Posted by anonymous on May 8th 2019

    This is my first 300 Blackout, and I love it. This is without question a quality product.

    Shipping was fast and arrived with lots of promo items (stickers, catalogs, hat, etc). I do recommend BCM, and will buy from them in the future.

  • 5
    BCM KMR-Alpha 7" Handguard (NFA)

    Posted by Lowell Carter on Apr 9th 2019

    Well made , fit and finish are excellent. Just the right size barrel and handguard .

  • 5
    Love It

    Posted by anonymous on Oct 27th 2017

    Used this as an extra upper for my 300 blackout. My other upper has an infrared scope so I put an eotech with magnifier on the BCM. It is lights out accurate. Carry it with me when turkey hunting since I see more wild hogs than turkey.

  • 5
    Excellent product, service, and SWAG

    Posted by anonymous on Oct 27th 2017

    The upper I ordered was very well put together. I've worked with a lot of ARs and I can recognize the quality of the product. Shipped and arrived very quickly. LOTS of great swag...posters, stickers, and a hat. Good advertising on their part and it was a great extra for me! I highly recommend BCM.

  • 5
    9" Blackout Upper

    Posted by anonymous on Dec 28th 2016

    Item was shipped quickly! Product was excellent quality! The unexpected extra swag was awesome! Very happy with purchase! This is why there company sets the standard!

  • 5
    300 blk upper

    Posted by kj on Oct 13th 2016

    Very impressed with this upper!
    I would put in on par with my Daniel Defense and Larue rifles!!!

  • 5

    Posted by anonymous on Sep 22nd 2016

    Very pleased with this product so far.

  • 5

    Posted by Sean Tuitele on Sep 22nd 2016

    Perfect uppers, my wife was depressed that your lowers were out of stock.

    It's painful putting another brand lower on this upper.


    Thank you for what you do. We are grateful for your team.