A 20 year old 870
Next to an aggressively barking dog in a darkened house the 870 Wingmaster would be a huge deterrent.
Go to your basement and turn off the lights.
Place a heavy dose of bad guy meds in the mage and rack that action and listen to what I am talking about.
ok, disclaimer make sure the gun is on safe and your familiar with it before doing what I mentioned.
Bad guy is either going to keep coming for something or going to wet his panties as he runs out the door.
Nothing sounds as mean as a pump action being racked in the dark, well maybe Thor being awoken from his slumber...
They both make distinct sounds !!
Rob