BG 10.5" 300 BLK Upper Receiver - Black | A2 | 9" M-LOK | Without BCG & CH

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Product Code: BGBU-1053009A2-BLK
MSRP: $391.95
Sale Price: Sale Price: $188.95
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Builder's Grade Barreled 10.5" 300 BLK Upper Receiver | A2 | 9" M-LOK - Black Anodized

This 10.5 inch M-LOK upper receiver comes with a 9 inch free float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a precision 4150 Chrome Moly Vanadium barrel.

Caliber 300BLK
Length 10.5"
Material 4150 Chrome Moly Vanadium
Profile Medium
Finish QPQ Corrosion Resistant
Gas System Length Pistol
Gas Block Journal .750"
Dimpled? No
Twist Rate 1:7
Muzzle Thread 5/8x24 TPI
Weight 20.8oz
Barrel Extension M4 Feed Ramps
Target Crown 11 Degree


Upper Receiver:

  • Machined from a Mil-Spec 7075 T6 forging Hard Coat Anodized per Mil-A-8625F, Type III
  • M4 Feed ramps
  • Made in the U.S.A.


  • 9" free float handguard
  • MIL-STD 1913 Picatinny rail on top
  • 3 M-Lok slots on 3 sides
  • Precision Machined 6000 Series aluminum, for high strength and weight savings
  • Hard Coat Anodized per Mil-A-8625F, Type III, Class 2
  • Clamp on system for easy assembly
  • Steel Barrel nut to resist movement under heat
  • 10 oz with barrel nut and hardware
  • 1.35" Inside Diameter
  • 1.63" Wide
  • Made in USA

***Please allow an additional 2-3 business days of lead time as these uppers are made to order.***