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.
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.