BCM® Standard 9" 300 BLACKOUT Upper Receiver Group w/ KMR-A8 Handguard

MSRP: $984.50
Your Price: $731.45
(You save $253.05 )
(97 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-A8 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-A8

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.***

97 Reviews

  • 5
    Customer review

    Posted by Robert Jacoby on Aug 13th 2018

    Review body is empty

  • 5
    Customer review

    Posted by Joseph Bangor on Dec 17th 2017

    Review body is empty

  • 5
    Icing on the cake of my first 80% lower AR pistol

    Posted by Texas on Oct 27th 2017

    AMT 80% lower, JP enterprises gen 2 silent buffer spring, ALG defense ACTrigger, 5DTactical jig, surefire mini can over surefire compensator. Tight groups 50,100, and 200 with sub and supersonic without waking up the neighbors. BCM is the standout on fit and finish. Thanks for the excellence.

  • 5
    Great Experience

    Posted by James Carmon on Oct 27th 2017

    Prompt service (the credit card / shipping requirements suck) and Bravo Company threw in lots of free swag! I will certainly purchase again from Bravo Company!

    Too bad the BATF does not move as quickly, as I will not be able to use the upper for probably 6 mos.

  • 5
    300 Blackout Complete Upper

    Posted by Christopher Griffin on Oct 27th 2017

    Terrific quality and quick shipping with BCM swag. This is why BCM uppers have homes on 3 of my rifles so far. Terrific company.

  • 5
    Solid company

    Posted by FRANK CARUSO on Oct 27th 2017

    I've been wanting a BCM upper for a while after many word of mouth recommendations. Just waiting on my stock for my build to be complete, so I haven't run it yet. Fit and finish are excellent! Had to take off that beautiful comp mod 1(no A2 birdcage here!) to fit my can, but I'll use it somewhere! Slim handguards even with rail covers installed. And thanks guys for all the BCM swag! It was like Christmas all over again. Semper Fi brothers.

  • 5

    Posted by Joe Brautigam on Oct 27th 2017

    Great upper, fit/finish excellent. Very accurate, cycles subs/supers, suppressed/unsuppressed. BCM is good to go!

  • 5
    9" 300BLK

    Posted by Jared Dana on Oct 27th 2017

    This is nothing short of amazing! Haven't found anything yet that shoots larger than an inch out of it. If you're hesitating about getting one; stop and add it to your cart!

  • 3
    Perfect upper on sbr host

    Posted by N7 on Oct 27th 2017

    as mentioned about its a quality and reasonably priced 300blk upper...
    but not everything is perfect.. I feel that revisions to the rail must be made. Everyone is gonna say but you bought the rail closest to the muzzle.. yes I did but I have other uppers and I have never had this much 1st world problems mounting a flash hider/muzzle brake.
    Word of the wise I hope you have a thin line type wrench, crowfoot, etc. to be able to torque your preferred muzzle device onto this upper.
    Shoots like a champ to close this out. 9in 200gr/220gr ammo with Spikes st-t2 buffer, and BCM BCG. No failures and brass land in the same spot all day long.