Goemon,after a long careful examination of available weapons, purchased a Glock 21 as his personal pawgun.
Here he is, after letting off a few rounds in the livingroom.....

The polymer frame soaks up a lot of the recoil. Having fur covered paws also helps.
As you can see, his first victim is that small stuffed dog in the background. The little brat has been taunting Goemon for weeks.