Integrals truly are "movie quiet". We have a pellet rifle thats rated for 1100 fps that is significantly louder than our EOS-22.Integral 10/22 is about as much fun as you can have shooting suppressed. Sounds like a big pellet gun except it shoots 25 times. Get a barrel and then build the gun around it.
http://www.kgmade.net/firearms/product/eos-22/