I'm pondering a build idea for some kind of Trench Fighter 3/Mysterious Stranger Gunslinger/Archaeologist Bard build that focuses on using the Double Hackbut and Vital Strike because it sounded cool (even if it's not the best build), but now I have an issue:
Originally I was thinking I would see if the DM would go for an Immoveable Rod mount for my Double Hackbut, but I already have an extreme optimization reputation among my friends; I'm thinking it may make them facepalm, even though I think the DM is inclined to think it's awesome.
With that in mind plan B would be to use a small sized variant of the gun which would not need to be mounted, but would give me a -2 to hit. That's not really a deal-breaker as I'm hitting touch AC, but if there is some way to reduce it I figured why not.
So is anyone aware of an option to reduce the size penalties for using an undersized weapon, either feat or trait?