You get 1 ammo pick up with zarr, bramma and ogris. Before this wasn’t a problem because you had different types of ammo(rifle,pistol,shotgun,sniper) meaning you get 1 pick up per ammo type and you could always have ammo but it was changed to primary and secondary ammo types only, drastically reducing available ammo and viability of these weapons.
Incarnons have replaced these weapons now for the most part
Zarr/Bramma : Toxin
Nukor/Plasmor: Magnetic