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BCM Standard 12.5" 300 BLACKOUT Upper Receiver Group w/ BCM KMR-Alpha 10" Handguard (NFA)

BCM Standard 12.5" 300 BLACKOUT Upper Receiver Group w/ BCM KMR-Alpha 10" Handguard (NFA)
300 BLACKOUT Barreled Upper Receiver Group with BCM KMR-A10


 
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List Price: $890.00
Our Price: $659.95
You save $230.05!


Stock Status:In Stock
Product Code: BCM-URG-300BLK-12-KMR-A10

Add BCM® Bolt Carrier Group with Upper Group

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The one and only BCM® milspec Bolt Carrier Group!
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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 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





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Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 11 Write a review.

  0 of 0 people found the following review helpful:
 
5 of 5 September 21, 2019
Reviewer: Jordan Wallace from Rathdrum, ID United States  


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  2 of 2 people found the following review helpful:
 
5 of 5 BCM Does it again. May 8, 2019
Reviewer: David Hunley from Columbia, MD United States  
They never fail to amaze me. I absolutely love BCM. Fast shipping, excellent quality. Best price for the quality. I trust my life with my BCM gear.

I served in the Marines as a infantry man than A MOUT Instructor, I was awarded the opportunity to handle a lot of weapon platforms.

I came across BCM a few times and was extremely impressed with the quality of the Machine work. The accuracy is right up there with the quality as well.

I own 6 BCM uppers, and I will always be a patron of the company.

Thanks guys.

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  0 of 0 people found the following review helpful:
 
5 of 5 Perfect February 2, 2018
Reviewer: robert fitzpatrick from wyandotte, MI United States  
As usual ..... my experience with BCM with my 300 blackout upper was excellent. I have been ordering rifles and accessories from BCM for years and will continue to do so.

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  0 of 0 people found the following review helpful:
 
5 of 5 300 BLK upper December 28, 2016
Reviewer: Tommy Davis from Dandridge, TN United States  
Quick service, customer service second to non. Top quality product, and the company that shows proud in their product and in their customers. Will remain a loyal customer for future purchases.

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  0 of 0 people found the following review helpful:
 
5 of 5 BCM 300 Black Upper Assembly June 13, 2016
Reviewer: Monte Stanloski from Allegan, MI United States  
BCM products are good looking, well made and milspec. Any more and you're paying for bling. Any less and you're buying junk. Barrels are the right steel, properly lined, the right twist, the right finish, have the M4 feed ramp and are HPT/MPI. This is the third upper assembly (with bolt/carrier group) I've purchased from BCM. Flawless every one. The only variable I've faced was selecting the proper buffer weight for the shorter barrels.

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