Might want to look into the SWR Spectre. Its a little more money and a little larger, but is VERY quiet and can also be used with 5.7 and 17hmr if you ever feel the need to use it on another caliber. I have one and its silent on my 10/22. Here is a video of it and the only sound you hear is the action.
http://www.youtube.com/watch?v=5IEihyQRpAE