Any firearm mod?

[oceanrage]

Is there any mod that adds a firearm weapon only?  So I can for example download the weapon and use it in a mod set in the middle ages were everyone has swords and such, whereas I have a pistol or what not

 

[Caba`drin]

There's a pistol that is included in the game, if you want to be the only person with a firearm, then there is no need for mods.
Enable the cheatmenu (hit CTRL~ and then type "cheatmenu" in the console and hit enter). Then in your Camp Menu hit Cheat Menu and Find an Item. Buy the pistol and its cartridges. Then turnoff the cheatmenu (hit CTRL~ and type "nocheatmenu").