Another option are the plastic carpet liners. The kind you get at an office store to protect the floor from a computer chair. You can also get it by the foot(usually 3 foot wide), at hardware stores. I work at an Ace Hardware, and we sell a few different styles.
"Breathe when you can, shoot when you should."
"Qui desiderat pacem, bellum praeparat; nemo provocare ne offendere audet quem intelliget superiorem esse pugnaturem"