Will there ever be multiplayer support for this mod because I tested out multiplayer and only the host can use the gun.

What version are you using?

I am using version v1.2.0 the newest one I tried using this mod on multiplayer because I wanted to make a co op portal map but found out only the host of a plan server and or the first person to join on a actual server can use the gun everyone else it doesn't even shoot.

Dont know if this is a bug or if it was not intended for online use

It is intended for multi-player use. Can you join the Discord at https://discord.gg/m3EjDuuekg