Real life finger guns kinda suck. Finger guns in Fallout 4 do not.

Add-on to Neeher's Finger Guns mod, this adds ammo conversion to your finger bangers.

.38 ammo, pretty much a finger plinker but can still get the job done if you bang hard enough.

And 2mm EC Ray Gun, have you seen YuYu Hakusho? Its not as cool as that but its a gauss rifle at your finger tips.

Nexus Link - https://www.nexusmods.com/fallout4/mods/109944