Wotc made a good gunslinger class.

[Sir cryosin]

So I had a npc attack the party with a magic black powered rifle. I made the npc a arcane Archer. So after last night's game with that npc. You can take the arcane Archer change force damage to piercing or bludgeoning whatever one you want to pick. Change there 7th lv ability to fast hands that lets you reload for extra attacks. And change some wording and you have a nice gunslinger.