Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze

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On Sale
  • Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver
  • Burnt Bronze AR15 Pistol Upper Receiver with 12" M-Lok Free Floating Rail
  • 10.5" .300 Blackout Barrel with 1:8 Twist
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 10.5" .300 Blackout Flash Can Upper Receiver

  • Finished in Burnt Bronze Cerakote
  • Made in the USA
  • 7075-T6 Mil-Spec Upper Receiver
  • 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride
  • Chambered in .300 Blackout (7.62x35)
  • Pistol Length Gas System
  • .750 Low Profile Gas Block
  • 12" Octagon M-Lok Rail

*****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.


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Additional Information

Burnt Bronze
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1 Review

  • 5
    Fantastic Finish

    Posted by Chris S on Feb 12th 2021

    I have been trusting grid defense for over a year now with all my AR builds. The customer service is excellent and so is the machining and the coatings/finish. I used this upper in a a 300 dream build and I couldn’t be happier. Chris S.

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