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

Genesis Weapon Store;

Looking at the clothes that cost over 500 gold coins, Song Yue let out a deep sigh as she sat on her bed, "Lu Zhen is really too much. He doesn't have to spend this much on something like a fake engagement. I guess it might have to do with the guests that are arriving.

I know it's not real but still, it would be nice if there's someone with me."

Just as she was also feeling lonely, missing her best friend, the door was knocked on, twice.

She put aside the dress and opened the door only to be surprised, "Ma!"

It was her mother that was standing outside. Song Yue's mother, Chen Xiao couldn't help but break into tears as she caressed her daughter's face before they hugged each other.

After talking for a while, mainly about Song Yue's life at this place, the latter asked about Song Yun. "Ma, what about Baba?"

Mark and Song Yue's engagement ceremony