Description

About the BCM® Standard 9" 300 BLACKOUT Complete Upper Receiver w/ KMR-A8 Handguard

Features:

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

Whats included with this complete upper:

KMR-A8 KeyMod™ Handguard.
KMSM (KeyMod™ Sling Mount)
One 3" Picatinny Rail Section
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 H3 buffer with high velocity ammo.

If running subsonic ammunition, it is recommended to run your suppressor and a carbine buffer. 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.

Specs

Caliber: 300 Blackout
Barrel Length: 9"
Barrel Material: 11595E Spec Steel
Barrel Finish: Manganese Phosphate per Mil-Spec
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

Shop Related Products:

Want to see more upper receivers? Click the links below to view more BCM® AR complete uppers!

Bravo Company builds: Life Saving Tools™

131 Reviews

5
great quality exceptional Customer Servic

Posted by Kevin Graber on Dec 28th 2016

If you great quality at a good price, BCM is the company to buy it from
5
Super light

Posted by Frank Petrini on Dec 28th 2016

I've been building ARs for years. I decided to build an ultra lightweight SBR, and found I couldn't build it any cheaper or with better parts than buying this upper complete. I'm super happy with this, and the 11.5" 5.56 upper I bought to interchange on my SBR lower.
Highly recommend
5
So awesome

Posted by Reid Baker on Dec 28th 2016

Well made, compact. Purchased for a sbr build and could not be happier with the fit and finish. I already own a 16inch version with the same handguard that is great and a 223 pistol upper. Package came with a hat and very compact and light keymod qd mount.
Bcm makes great stuff.
5
Best purchase/awesome company.

Posted by Brandon on Dec 28th 2016

I will forever be a BCM customer after my first purchase! Delivery came fast, item was nicely packaged and I was not expecting all the cool goodies that came with it! Thanks BCM you have yet another satisfied new lifetime customer!
5
Outstanding quality upper

Posted by Xrica40 on Dec 28th 2016

Everything feels tight and the accuracy is great, BCM barrels are my favorite, I own two. You won't be disappointed. Great price as well
5
9" 300 blackout upper

Posted by Robert on Dec 27th 2016

I haven't had a chance to take it out and shoot, but inspected it and didn't find any issues. It was delivered pretty fast looking forward to shooting it.
5
BCM Standard 9" 300 BLACKOUT Upper Receiver

Posted by John Kitchen on Dec 17th 2016

Super fast shipping. Great quality product.
5
9" 300 blackout

Posted by Travis Perdue on Sep 24th 2016

Awesome product awesome service shipping was spot on doesn't get any better!
5
9" 300 AAC Upper

Posted by Bryce Rogers on Sep 22nd 2016

I purchased the BCM upper for this cartridge for the absolute belief that you had made it reliable and as perfect to our current machining ability or that you wouldn't have made the product at all. Thus far, I am only 100 rounds into it and I have not been let down.