They dont work. Nailguns with the suppressor attachment dont work.
I guess ill have to go unstealthy with them.
Nail guns dont make any noise (I think). With a 4 damage, its the most silent gun in-game (I think). Also I made a post about this some time ago (I think)
You can put suppressors on Nailguns. They do 0 damage afterwards but it’s awesome just for the novelty.