muted junco
May either appear in The Junction or 2B, and may cost a hefty price to remove (2000 to 8000 Flux, depending on how many quirks the gun has, or 3000 carbon to make it even costlier), and he can only remove 1 quirk from a gun only once, which limits how many quirks you can strip a gun clean, similarly functions to dismantle but keeps the gun and removes only the selected quirk.
This is for those who messed up with the forge, or someone got a good gun but has to clear at least 1 quirk slot for a weapon incase of a future build.
Unless the devs feel a little more...cruel with this idea; Desync the weapon after the Quirk Removal.
Edit:
If that suggestion above does not work, may aswell make it a "Quirk Slot Expansion" NPC
waxen eagle
unreal turtle