Kami-sama no Memochou - Volume 9, Chapter 7

As a new anchor of StarTV, Yu Yan’s ruthless trash-talk, natural rifle-shooting skills, and character of never searching houses earned him a big crowd of fans.

He felt like he was a good anchor who treated all fans of his stream equally—you can suck at the game, you can get knocked down, but if you want the gun in my hand, sorry, no way man.

Until he heard the voice of the streaming platform’s Big Boss.

Yu · ultimate voice-con · Yan: I’m not familiar with this game, swap my Kar98k for your Mini-14.

Yi · brand new noob · Chen: En.

Friend: Daddy, I want to snipe too!

Yu Yan: I think this frying pan suits you very well.

Not-a-very good gamer but dripping with money and looks Big Boss vs Cute, super good trash-talking gunslinger voice-con Anchor.

- Description from Novelupdates

After dying as a college student, Kain wakes up in a magical world where people form bonds with spiritual creatures to fight alongside them. Determined to rise to the top, he relies on a System and loyal companions.Everything seems to align with his ambitions—except the spiritual creatures he can contract seem to be remarkably…strange

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.