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

Meng Tao and Chang Bo were kneeling on the floor with Mark sitting on the chair and staring at them.

His anger couldn't be subsided no matter how much he tried to be calmer.

Chang Bo and Meng Tao defend themselves earlier by how it incredibly made the store popular and how they raked in earnings of about 754 gold coins in just a matter of two days.

If one considers the rewards they gave out in the form of guns and grenades and the cost of ingredients, the profits were still over 600 gold coins.

Mark scolded them for misusing their freedom to do whatever they want and he shouldn't have put a teenager a young adult to manage his store. He explained that he didn't lack money and that what he intends to do is to promote firearms.

Chang Bo once again defended his actions by arguing that his strategy has made them sell 285 gold coins worth of firearms and ammunition.

A Menu of Transformation