Grid Defense 7.5" .300 Blackout Upper Receiver - Burnt Bronze

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On Sale
  • Grid Defense AR15 Pistol Upper Receiver Chambered in .300 Blackout
  • Milspec Upper Receiver with 1:8 Twist Barrel and M-Lok Rail
  • 7" Grid Defense Free Float M-LOK Hand Guard
Sale: $299.00
MSRP: $379.00
  • 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 7.5" .300 Blackout Upper Receiver 

  • Finished in Burnt Bronze Cerakote
  • Mil Spec 7075-T6 Upper Receiver
  • 7.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride
  • 7" Grid Defense Octagon M-Lok Rail
  • Pistol Length Gas System
  • A2 Flash Hider
  • Chambered in .300 Blackout
  • Made in the USA

*****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
    My new around the house gun

    Posted by Harlan on May 5th 2020

    Very nice and tight fit and finish. Combined with the bronze mbus sights and p mags this thing looks real sweet, actually very sweet. Sighted in at 100 foot and this thing will beat out a hole the size of your eye ball socket. Running 200 gr. sub. My Daughter wants a pink one now and my Dad wants a burnt bronze so yes, they are nice and I will be getting more. Yes, buy one or maybe 3, you wont be unhappy.

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