How about a large caliber airgun? They aren't quite but they don't sound like a firearm.

I boight the 17, got home and remembered i own a 300 blackout thats suprressed . Never shot it , won it at a dinner. After i did all the paperwork i also found a 223 ruger american on the used rack too late tho.

that depends on the ammo even the 4 inch barrel you can hear the crack from the some of the Supersonic ammo it isn't bad but it is not the 1070fps standard velocity quite.

with the 1070 SV ammo or any of the subs , I can be shooting on one side of the hose and a person on the other side of the house has no idea. on a dead still day you can pick out the little click. but they wouldn't know if you are using you manual Arrow T-50 staple gun hanging the targets or shooting them.