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

https://www.patreon.com/snowstar

Weapon seller in the world of magic

Fortunately, his suspicions turned out to be false as she explained, "No, my father is willing to hand over the throne to me but he doesn't have the power to face the rebellion from the society.

It was because of this decision that I fought to buy the 1000 panzers and purchase rights for howitzers. But, they can only be used to suppress the rebel elements.

I need a partner who can stand by my side, someone who doesn't look down on women, someone intelligent, someone strong, and someone who doesn't give a shit about how difficult the problem is.

And I don't think I can find a better husband than you."

Mark didn't speak for a while, digesting everything that she had told him earlier. It would be a lie if he says that he wasn't impressed in the least but still, her reasoning wasn't enough for him to consider marrying her.

Shen Ling's scary analysis (part-1)