According to the Crysis 2 guide book I bought to try and help me through this game ( I can't play worth a hoot ), it gives a detailed breakdown on all weapons, suit functions, etc along with play by play for each level and it did say that the suppressor will reduce both power and range to some degree. It gave the example that in some cases, the sniper rifle would require 2 shots to the head at long range but only one without. Same for shotgun. When I played the game, I found it to be true more or less, did not seem to make much difference until I stretched the range, although I did notice that the shotgun does seem to have a bit less power at all ranges with it on. But that is just what this big book claims and what I seem to be able to confirm, on the other hand, I STINK and play so terribly I have to stick to single player for fear of getting embarrassed and causing so much trouble for others on line..........