How silent do you want it? Even a semi auto .22 pistol is extremely quiet with a good silencer. Rack the slide with some vigor and that is about as loud as it gets. I could easily shoot in a backyard and not have the neighbors know what was going on.
Here is my 10/22 semi auto rifle with SWR Spectre and you can hear its almost dead silent even with the action moving. For an idea of how loud, listen to the end and you hear the hammer drop on an empty chamber and its almost as loud as the action cycling.