Super Weapon Swap System

*Because of an accident he was travelled into 1979 with the system.
And became the weaponeer of this new country!
"Dingdong! Super weapon exchange system activated! "
The 62 tanks were too old. 
Thanks to the system, From the 2020 weapon cemetery, I could exchange it for an M551 Sheridan tank. 
Was it not enough? Was the T-72 okay? 
Was the M1A2 okay? How about Leopard 2?
There was only one M523. How to replicate it? 
It would be better to exchange it for a male cat! 
What? Other than the weapon cemetery, there was also a machine cemetery. A gold graveyard? 
How about all of these could be exchanged? 
This was an light novel about the rise of the military, and made for military fans.