BG 16" 5.56 Upper Receiver | A2 | 15" Quad M-LOK Slant Cut| Without BCG & CH | FDE

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Product Code: BGBU-1655615Q-FDE
MSRP: $421.95
Sale Price: Sale Price: $230.95
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Builder's Grade 16" 5.56 Upper Receiver | A2 | 15" Quad M-LOK Slant Cut | Without Bolt Carrier Group and Charging Handle | Flat Dark Earth

The 16 inch M-LOK upper receiver comes with a 15 inch quad free float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel making the action smooth and easy to keep clean.

Caliber 5.56
Length 16"
Material 4150 Chrome Moly Vanadium
Profile Government
Finish QPQ Corrosion Resistant
Gas System Length MidLength
Gas Block Journal .750"
Dimpled? No
Twist Rate 1:7
Muzzle Thread 1/2x28 TPI
Weight 28oz
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
  • Flat Dark Earth
  • Made in the U.S.A.


  • 15" free float handguard
  • FDE
  • MIL-STD 1913 Picatinny rail on top
  • 4 M-Lok slots on 4 sides
  • Precision Machined aircraft grade aluminum, for high strength and weight savings
  • Clamp on system for easy assembly
  • Steel Barrel nut to resist movement under heat
  • Made in USA

Please Note: Uppers may present light fouling from our quality control process and/or test firing

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