Quiet airgun suggestions? I'm looking to purchase an airgun for plinking in my yard. It's a suburban neighborhood but our yard is totally fenced in and I will be using the wooden stockade fence as a backstop. I will be shooting at a distance of about 50 yards. 

I'm looking for a break barrel style that is quiet enough to not annoy our neighbors nearby. Accuracy is equally as important but I don't care about aesthetics for this gun. 

Also looking for scope suggestions but only if it's powerful enough to do double duty on my CZ 455 bolt action rimfire. Something with 12x or maybe 18x.