well good, it'll give standard AC's another stop gap upgrade if we could combine (or house rule) that that ammo type would be equally good at AA and PBI duties. And it wouldn't really step on any LBX toes.
Yeah, as much as I'd love to see ACs being brought into line with other weapons, that's not happening any time soon. That's why I like these sorts of changes. They help out AC mechs without having to change up record sheets, and it helps the world make more sense, which is generally nice. ACs can kill infantry alright, but still get a lot of benefit from specialty ammo (in this case Anti-Air/Infantry).
Chance are most of the other specialty AC ammo types (Precision, AP mainly) should maintain their existing damage, though. being solid shots or rocket-guided projectiles ought to come with some penalty to raw potential against unarmored targets
