The bombs are nearly worthless compared to the standard Nitronome, as far as I remember (Not a big bomb user), that's a big iffy. The last thing that we need is a useless gun, doomed to be forever shadowed by Valiance.
And I'm entirely clueless on the Almirian Crusader. Practically nobody uses it (Or it's hidden by a costume).
There are only so many things you can do with a gun, though I admit they've been very creative (Pulsar and Catalyzer, I take my hat off to you) with the gun mechanics.
The thing is all the branching-out weapon variants do normal(at least now, hopefully a buff in the future) and as it is said handgun would seem out of place.
Maybe a parallel to the calibur and make a sort of crappy damage bonus to monster family niche weapon.