I'm not saying the new gun class is going to be... but its going to be...

[Duelle]

Though someone else in the thread had mentioned that originally in FFXI RDM was able to use guns.

RDM had access to guns during vanilla FFXI. Much like PLD there could use axes and great axes when zilart came out. There was something of a jobs revamp at one point, where RDM lost a lot of the stuff it started with (Flash, access to guns) and was turned into the lolenfeebler/refreshbot we know today. This said, guns were VERY minor in FFXI if your class was not Ranger, and even then sparsely used due to how expensive ammo could be. As such, I wouldn't use it as a sign of things to come here. It's a possibility, but one I hope is VERY unlikely.

Unless they make this:

Which is a female variation of this character's outfit from Tactics Ogre. Yes it looks awesome and I agree that XIV's designers should take some inspiration from this design for the RDM aesthetic (they owe us after the horrible outfits from that third FFXIII game and Bravely Default), but the gun is a very minor detail in the greater whole. Something that should not happen to a gun-centered class.

Honestly, if you talk to me about musketeer, I often think of this. Despite it being from Granado Espada, the outfit design would very easily fit into Limsa's aesthetic with few, if any, adjustments.