BCM® Standard 16" 300 BLACKOUT Complete Upper Receiver Group w/ KMR-A15 Handguard

MSRP: $1,103.50
Your Price: $836.45
(You save $267.05 )
Maximum Purchase:
5 units
300 BLK
Barrel Length:
Barrel Style:
Stock Status:

Out of stock

About the BCM® Standard 16" 300 BLACKOUT Complete Upper Receiver w/ KMR-A15 Handguard

  • 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).

Included with this complete upper 

  • KMR-A15 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.


  • Caliber: 300 Blackout
  • Barrel Length: 16.1+"
  • Barrel Material: 11595E Spec Steel
  • Barrel Finish: Manganese Phosphate (Mil-Spec A-A-59267)
  • Bore & Chamber: Chrome Lined
  • Weight: 3 lbs
  • Twist Rate: 1:7
  • Gas System: Carbine
  • Muzzle Device: BCM® Comp Mod 1 (762/300BLK)
  • Muzzle Threads: 5/8x24
  • Handguard: KMR-A15

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™
Copyright 2023 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.***

33 Reviews

  • 5


  • 5
    300 BLACKOUT Upper

    Love BCM uppers this is my 2nd upper from them. Never have any issues. They function under every condition and weather I've been through. Excellent product.

  • 5

    Product was PERFECT!! Got a bonus hat and posters which was great! Level of quality and function are unmatched!!

  • 5
    Customer review

    I love it. Have 0 complaints about the upper I have put about 100 rounds through it and it performs perfect. Will be coming back to you guys when I build a lower for it.

  • 5

    Fantastic product, quality all around well built and made in America! BCM

  • 5
    300 blackout upper assembly

    Could not ask for a better upper and BCM is super fast shipping and give you some awesome stickers and posters me Being a old coal miner I love stickers and I love a company that works as hard as us old miners have done to provide a service to the public Thanks from your friend Slickwillie

  • 5
    Everything you'd expect

    Craftsmanship is beyond reproach. Has the absolute look and feel of a quality product. Matched with a Noveske lower, the accuracy has met or exceeded my expectations. Extremely happy with this purchase!

  • 5
    Love the goodies

    I really loved the hat and stickers included with my purchase. Very nice touch, thank you.

  • 5
    Great service, great product

    Ordered my upper on Tuesday after hours before Christmas and had it Friday by lunch. Product was just what I ordered, well oiled, and accompanied with extra goodies. Good job BCM!