I am thinking of taking the leap and putting together a suppressed 9mm pistol...and, NO! It isn't for when the Zombies attack...at least not just for when the Zombies attack....okay, maybe it is for when the Zombies attack. I am clueless at what I am looking at. I seem to find decent ones starting at about the $550 range and going up to about $900 for the nicer ones. I see some that have a noise reduction of around 25Db (the shorter ones) and up to about 30-38Db. I even see one that says it has a noise reduction of 125Db. Can there really be that big of a noticeable difference? I know I have to pay the tax stamp and get a threaded barrel. Now I just need to decide what suppressor. Any help would be appreciated. PS: I might be putting it on my SIG P250 or I might buy a gun specifically for it.