Sometimes things are called a certain way and we just don’t question the game logic.
If you have suggestions/ideas for a hero concept, you can make one. Some folks go into great detail to give them a background and design and some just keep it simple. If you use images, make sure you site them.
Ahem,
Barons minigun is technically not an LMG but this is video game logic for you.
A railgun and a coil gun are the same idea, just with different execution of said idea, but it’s still not accurate enough at mid to close range to be anything BUT a sniper rifle.
Halloways gun is just a gun, unless you mean the gauss cannon from halo, then yes it should not be an assault rifle
Phalanxes gun is a gorgon plasma RIFLE. And most energy heroes in the game have plasma weapons.