Chương 309: Chapter 310 Refitted the Missiles Chariot

While everyone was resting and cooking, Harry went to the second floor of the base alone.

He planned to take the upgrade of the helicopters first.

There were too many supplies in the military base in the Mountain Areas, so it was definitely not enough to carry them with several helicopters. It needed more capacity to carry them.

Looking at the armed helicopters in front of him, Harry sat cross-legged on the ground.

"Alpha Dog, open system upgrade interface and make all the armed helicopters here upgraded to LV3 avenger helicopters. Now the corpse tide is getting stronger and stronger, and there will be more and more flying zombies. The LV1 is not safe!"

"Sir, there are fifteen armed helicopters at present. Upgrading to LV3 avenger helicopters requires a total of 135,000 tokens. Are you sure to upgrade?"

"It seems that upgrading one helicopter is not enough. It really costs a lot to upgrade all!"

Harry smacked his lips and grumbled.