I'm debating on actually making a new POST for this, but since I'm working with Aidan10 I'm gonna just post this here anyway...
A player type should be made along with these models.
Three player types each having their own custom HUD system.
(not sure if possible)
They all do the same, but they look different
Default (HEV suit) would be the normal orange color pallet
Secondary would be the security armor blue color pallet
Third would be the HECU PCV armor green color pallet
I don't know much about player types, I've seen some crazy stuff done for them before.
For basic things, have the normal health meter as numbers in the bottom left corner (ammo isn't required to display, this can be done with the custom weapons but this would reduce the customized color for each player type).
IF armor (battery meter) is possible I have no idea how to manage this through battery pickup, possibly if this could be event based.
Like previously stated, ammo meter may just be thrown out because it (would / may?) be difficult to make each weapon to have a different ammo indicator (color pallet for each player type).
Each player type doesn't have a custom appearance, they are what ever skin is applied by default (the models being made here).
There are two ways (if the basic is possible, and if this is even close to possible) that each HUD could look like...

