July 4th Sale - Use Coupon: 1776

BG Complete 16" 5.56 Upper Receiver | A2 | 15" Quad M-LOK | With BCG & CH | FDE

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Product Code: BG1655615Q-FDE
MSRP: $472.95
Sale Price: Sale Price: $303.95
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Builder's Grade Complete 16" 5.56 Upper Receiver | A2 | 15" Quad M-LOK | With Bolt Carrier Group and Charging Handle | Flat Dark Earth

The Complete 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 and our black nitride bolt carrier group that is finished with an incredible polish, 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 27.2oz
Barrel Extension M4 Feed Ramps
Target Crown 11 Degree


Bolt Carrier Group:

  • Enhanced 9310 Steel (Bolt)
  • 8620 Tool Steel (Carrier)
  • Bolt is shot Peened and MPI
  • All BCG components are pre-polished before being processed and then post polished for an incredible shine

Upper Receiver:

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


  • 15" free float handguard
  • MIL-STD 1913 Picatinny rail on top
  • FDE
  • 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

Charging Handle:

  • Alloy Charging Handle Assembly
  • Complete with Standard Latch
  • Made from hardcoat anodized aluminum
  • Black finish

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.***