besides the bow, they are decent guns with the right skills, I'd use piglet instead other nade launcher, since I anyway run melee skills so reload isn't so bad with melee kill reload speed,
the shotguns are pretty good, just need to use secondary as well, right the right combo they are pretty OP and ammo is not a concern
the pistol, I love the single reload on the pistol, so I'd combine it with sniper's single shoot or melee (or both) and reload speed the pistol

Rpk looks amazing stfu