This is a simple Datapack trying to recreate the Portal Guns from "Portal" and "Portal 2".
There are two different Portal Guns, blue and red, each working independently.
The Pack works on Multiplayer, but there can only be one of each portal (Red, Orange; Blue, Aqua).

Obtaining:
#1 Commands
When the datapack is installed and you have OP/Cheats Allowed you can use the command below to get both Portal Guns.
/function ninis_portals:give_portal_guns
#2 Crafting (Requires "Nini's Custom Crafter Datapack" which is linked below)
Custom Crafter (Add easy NBT recipes!) Minecraft Data Pack (planetminecraft.com)
When the Datapack is installed you can use the Crafting Recipes show in the Images above to craft the Portal Guns

Usage:
Shift + Right Click: Switch Portal Color (Red <-> Orange; Blue <-> Cyan)
Right Click: Shoot Portal

I might make a texture pack in the future to make everything look pretty.

Hope you enjoy it be sure to leave feedback in the comments.

:D