BCM® Standard 12.5" 300 BLACKOUT Upper Receiver Group w/ KMR-A10 Handguard

MSRP: $890.00
Your Price: $659.95
(You save $230.05 )
(11 reviews) Write a Review
Stock Status: In 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 KMR-A10 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: 12.5"
  • Barrel Material: 11595E Spec Steel
  • Barrel Finish: Manganese Phosphate (Mil-Spec A-A-59267)
  • Bore & Chamber: Chrome Lined
  • Weight: 2.5 lbs
  • Twist Rate: 1:7
  • Gas System: Pistol
  • Muzzle Device: BCM® Comp Mod 1 (762/300BLK)
  • Muzzle Threads: 5/8x24
  • Handguard: KMR-A10

Copyright 2015 Bravo Company MFG, Inc.

11 Reviews

  • 5
    Very good so far

    Posted by Bill Mullican on Dec 6th 2015

    Immediate inspection out of the box was not perfect, the markings are a little faded and the finish seems light, i would almost call this one blemished. Ran about 100 rounds for the first trip out today, 147 gr Remington & 220 grain Remington, 220 all suppressed, half the 147 suppressed, everything fed and fired perfect, very very happy with the function so far.

  • 5
    AWESOME!! 300 BLACKOUT Upper Receiver Group

    Posted by Patrick Anaya on Nov 30th 2015

    I am very pleased with the performance of the 300 BLACKOUT Upper Receiver Group. it performs as expected---excellent. Now BCM needs to produce AR10 308 Upper Receiver Group with a 18 - 20 barrel with the same perfection and performance. GREAT JOB BCM!