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

"Phuahaha, look at that pathetic team." "Wow, she sure is a beauty" "Is there a noble?" "I wonder which tourist is so brazen enough to take animals into the dungeon while depending on such a weak team." "The horses look high quality to me but they aren't Spirit Beasts." "Should we follow them?"

Mark and his party attracted the attention of a few adventurers as they went into the portal.

This party had a total of eleven members. 6 of them belonged to the adventurer team named Spades, two are Alina and Mark, and the remaining three are novice adventures, of which one person is from a minor noble clan who joined them for the experience.

As for the other two, the leader pitied them and let them join as the team was earning enough money for this journey.

Dungeon of Taslan (part-2)