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

"Does your store have any new types of weapons that are yet to be made public?" Zhu Jianhong put forth his first question, slowly revealing his intentions for this meeting.

Mark didn't expect such a question but he answered with a nod, "Yes, there were a few but the firearms were fairly new in the society. So, it will only confuse everyone if I display everything in the store."

Mark's reply brought a smile to the prince, "Can I see them?" He appeared to be eager.

This time, Mark intended to reject him but before he gave a reply, the King shut him off in a stern tone, "this isn't the time to fool around, Shen Zhi. Just be quiet for a while and let us talk."

As the prince was visibly disappointed, the King looked at Zhu Jianhong and signaled him to continue.

Prime Minister Zhu then asked, "Out of the weapons you sell, which one is the costliest one and which one is the most popular one?"

Mark's stance on Western Yan