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

Returning to the real world in disappointment, Mark took a nap to clear his head from having any sort of negative thoughts.

After taking a nap for an hour, he freshened himself with a shower and then dressed up for the grand banquet arranged by King Shen Niu in his welcome.

The courtiers, officials, top military personnel, and wealthy individuals all attended the banquet. Song Yue and Shen Ling joined the other ladies.

Mark felt the atmosphere is quite similar to the one he had at the Eastern Sun. There, he was a visiting guest. So, he was fine. But, here, he is going to be the son-in-law and he didn't like these things to stay that way.

Upon remembering Shen Ling's ambition behind this marriage with him, Mark felt like he should play more of an active role rather than standing behind her as the princess was going to overthrow the patriarchal system in the kingdom.

Unexpected Success and Dashed Expectations