Description
Grid Defense 7.5″ .300 Blackout Upper Receiver
Finished in Blue Titanium 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
Grid Defense 7.5″ Upper
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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