BCM® MK2 Standard 12.5" 300 BLACKOUT Complete Upper Receiver Group w/ KMR-A10 Handguard

MSRP: $1,105.50
Your Price: $828.49
(You save $277.01 )
(3 reviews)
SKU:
BCM-MK2-URG-300BLK-12-KMR-A10
Caliber:
300 BLK
Barrel Length:
12.5in
Barrel Style:
Standard
Handguard:
KMR-A10
Upper Receiver:
MK2
BCM® MK2 Standard 12.5" 300 BLACKOUT Complete Upper Receiver Group w/ KMR-A10 Handguard
Stock Status:

Out of stock

About the BCM® MK2 Standard 12.5" 300 BLACKOUT Complete Upper Receiver w/ KMR-A10 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:

  • KMR-A10 KeyMod™ Handguard.
  • KMSM (KeyMod™ Sling Mount)
  • One 3" Picatinny Rail Section
  • BCM® Comp Mod 1 - 762/300 BLK

Featuring BCM’s Patented MK2 Upper Receiver

This proprietary design offers enhanced rigidity over the USGI product.  The increased rigidity limits barrel deflection which aids in consistency/accuracy.   Less flex also reduces premature damage, wear, and failure of bolt lugs from misalignment.   A gas expansion chamber is machined above the charging handle track, combined with dual vents machined at the rear (each side, above charging handle latch) help to redirect and vent gas away the shooters face. U.S. Patent Numbers: 10670355, 10677549, D888182
 
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: 12.5"
  • Barrel Material: 11595E Spec Steel
  • Barrel Finish: Manganese Phosphate per Mil-Spec
  • 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

Shop Related Products:

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

 

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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.***

3 Reviews

  • 5
    Great! upper

    Purchased one of the last one due to shortages will be purchasing another asap!

  • 4
    12.5 300 blackout upper

    All in all this is an excellent upper. Fit and finish are emaculate. Excellent function. Shoots pretty decent groups even in 300blk. Only thing I can ding it for is its a little heavy on gassing. Not terrible but could be better. I will buy more.

  • 5
    300 BLk Upper

    This is my first complete upper from BCM. I was completely impressed with the build quality and design of the product. Fit and finish was perfect as far as I could tell. Have not fired due to ammo shortages. What really hooked me on this upper was the handguard. It is the most comfortable one I have. The upper is also very light. I was also impressed with their method of securing handguard. I will be ordering another one of their uppers with the same style handguard as soon as possible.