.22 Marauder is the standard for quiet. The pellet impact is literally louder than the hammer, which is louder than the shot report. There may be some quieter guns that shoot under 500fps, but for something that has the accuracy and power to kill pests at 50yds, there probably isn't anything quieter.
Agreed.
rockinbar sold me one and it is incredibly quiet and does great damage in urban environments.
