10 months ago
Last edited at 1:10PM on 2/25/2013
Depending upon the caliber of the firearm and the space from which projectile is fired, the cast iron skillet your mom has is likely the best shield followed by stainless steel utility items such as pots and pans. Outdoors the siding of the house if made of concrete, i.e. Hardy plank, could be a deterrent to shots fired, with the same restrictions on caliber and space. See Kokinaw's answer as well.