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

Upon hearing the sound of a gunshot at such a time, Mark felt curious. Except for the merchant Huo Fen, Song Clan heiress Song Yue, and the mysterious archer Feng Wu, all the other customers only bought one single-shot pistol from the store.

Considering the identity and occupation of his top three customers, he didn't think none of them would be at this time and place. So, he felt like taking a look.

"Allen, can you scan the surroundings and find the humans nearby? I meant only humans." Mark asked the Android. He knew that this personal assistant of his can find the positions of the living creatures within 10kms but what he doesn't know is whether his radar can distinguish beasts and humans separately or not.

Unfortunately for him, only a piece of bad news is awaiting.

Allen shook his head, "No, Big Brother, I can only sense living creatures in general apart from trees."

Mysterious archer and a mysterious little kid