I Have a Military Shop Tab in Fantasy World

A high-schooler who loves playing FPS games were reincarnated in the fantasy world. And usually, those who were isekaid were blessed with overpowered magic and a legendary beast. However, our main character is different. Instead of those things, he awakened a shop system where he could purchase American freedom! And since modern guns is as good as magic, he decided to make full use of this ability and make a name for himself in this new world. Fireball? Cute. My M203 grenade launcher makes a bigger boom. Summoned beast? That’s nice, I’ve got a UAV with thermal optics. You can split oceans with magic? Cool. I can erase cities with a nuke. Whatever overpowered spell you’ve got, I’ve got something better.