BCM® Standard 9" 300 BLACKOUT Complete Upper Receiver Group w/ MCMR-8 Handguard

The BCM® Standard 9" 300 Blackout Upper is engineered for optimized weight, balance, and performance. Featuring a continuous taper barrel for improved harmonics, a chrome-lined bore and chamber, and a rugged MCMR-8 free-float M-LOK handguard. Includes BCM® Comp Mod 1 (762/300BLK), sling mount, and 3" rail section. Ideal for suppressed setups and versatile .300 BLK configurations.
Availability: In stock
$831.45

Overview

About the BCM® Standard 9" 300 BLACKOUT Complete Upper Receiver w/ MCMR-8 Handguard

  • 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

  • Includes MCMR-8 Handguard
  • Includes MCMR-SM (MCMR 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 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: MCMR-8