Is the clans have an inferno short ranged missile? It seems that they don't like the special ammunition.
I think by default, Elementals DON'T use infernos by fluff, while the Salamander-BA specifically says it does.
But that is more fluff than per the rules.
Per the rules, BA can simply choose to use SRM or Inferno (Only those 2 options) similar to how a mech can choose its ammo from a larger selection list.
EDIT. I think it was also the original GDL books &/or maybe MW1E that mentioned Infernos are sort of "Dezgra"/dishonorable.
They are dangerous (Heat/Ammo Explosions), they cause excessive damage to the environment (Fires), and they were just plain "Frowned" on & mostly used as an item of last resort. Like pulling out a nuke, or calling in danger close Artillery strikes. You don't want to be in a position where using Infernos is a GOOD idea.
Lori Kalmar had a fear of fire, but really, EVERYONE has a fear of fire & the
game rules don't touch on something like, oh the cockpit got a hairline crack in it from MG fire & then I was doused in napalm & the pilot suffered burns from a bit of it spritzing into the cockpit or choking out the air, etc etc.
The little things that an NPC would suffer from mentally that our PCs just hand wave as "oh it can't hurt me, I'll just fire 1 less PPC next turn".
The fried circuits that occur when liquid fire gets inside the gear box or onto some electrical fuse lines.
The game doesn't get into how nasty that stuff is, heck, look at what the Widows did on New Delos.
They marched through a forest fire & lost 1-2 mechs doing so, but, fire is just some heat, and they were not shooting in combat, so, no issue right? Wrong.
Per the game rules that shouldn't have been an issue. Yet, it clearly was since only an insane furious bloodthirsty person does it. And lost mechs doing so.