You don't need a suppressor with the Quiet ammo.I have been buying up some CCI standard because it seems to run pretty quiet though my suppressor but I really like the quiet because its silly quiet though the suppressor. I bought a couple bricks from midway usa about 6 months ago and have not seen any since.
I have a couple of 500 packs of Quiet, but I only use it for the granddaughters with their Cricket.