this might be going over bored but a nice rifle with a suppresor could do quietly wut ur rifle could do. But hey if all else fail wait till the nieghbors are gone and bring out a 25mm automatic weapon a cycling rate of 630 rounds a minute. make sure u use depleting uranium shells. They start to explode and just go all over the place after tehy hit a target. Or use armor piercing rounds and get through the local grabage cans and trailers or those pesky cats. But u could do as i do and use a airgun, the Beeman SilverBear does me dirty work when u must be quiet. Keep Killin Kittys