Snowstar

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet." 
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
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Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
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Author's current works: War Online, My Soul Card is a Reaper
Author's other notable works:  The Last Slytherin, The Sharingan Hyuga
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You can also support the Author through Patreon or buy coffee on Ko-fi.com

https://www.patreon.com/snowstar

https://ko-fi.com/snowstar5061

Weapon seller in the world of magic

At once, silence filled the room for a few moments.

From Bai Xun to Song Tai, no one did expect Mark to flare up against the crown prince right in the presence of the Emperor.

But at the same time, they knew Shang Zexi was also in the wrong to raise his voice like that. Mark/Lu Zhen wasn't your average weapon seller that the crown prince had to showcase his authority over him.

If he is such a person, he wouldn't have been summoned to the palace like this. The crown prince should have handled this matter with grace.

Maybe, it is because of Mark's current status and how valuable he has become. Or maybe it is because the crown prince's situation isn't good in the palace lately. Whatever the case, the Emperor didn't side with him and instead scolded him as soon as Mark lectured him.

Shang Wei offers a deal