Grid Defense 16" 5.56 Quad Rail Upper Receiver - FDE

Write a Review
On Sale
Sale: $329.00
MSRP: $399.00
  • AR15 Bolt Carrier Group and Charging Handle | Mil Spec
  • AR15 BCG | 5.56 NATO/.223/.300 Blackout | Mil Spec
  • High Polish M16 Bolt Carrier Group
  • M16 Bolt Carrier Group - Titanium Nitride Coated
  • Trinity Force UL - B.U.S. Polymer Sights
  • Magpul MBUS Gen II Front and Rear Sight Set
Frequently bought together:


Grid Defense 16" 5.56 Quad Rail Upper Receiver - FDE

  • FDE Cerakote Finish
  • Chambered in 5.56 NATO
  • A2 Flash Hider
  • 16" 1:7 Twist 4150 M4 Barrel - Black Nitride
  • Carbine Length Gas System
  • Grid Defense 14" M-Lok Free Float Quad Rail
  • Grid Defense Mil-Spec 7075 T6 Upper Receiver

*****Ammunition Notification***** Grid Defense test fires every custom upper to verify cycling. We do not guarantee cycling with all ammunition due to vast differences in the quality of ammunition. We will only warranty cycling with US made ammunition. We will not warranty cycling with imported, steel cased or reloaded rounds.

View AllClose

Additional Information

Flat Dark Earth
View AllClose

1 Review

  • 5
    FDE quad rail

    Posted by Derek Hubbert on Sep 15th 2021

    Fantastic upper, phenomenal company that stands behind their product!

View AllClose