"Ion carbine has a rocket launcher that you can take out"
Rocket launcher.
"Ion Plasma Cannon works like a normal gun, it's more compareable to flame stat wise and minigun look/ animation wise. Comes with a shotgun that is similar to pbp but only shoots 2 bullets at once in close spread so it's easier to do 10 damage from longer ranges by hitting both bullets."
Ion bullets, similar to minigun/Flamethrower, with a shotgun Attachment similar to a PBP but is 5 damage stacking (2 bullets), doing 10 damage.