Old post, but I just wanted to say Thanks! and add a little bit to it if I may. The zombie targets, though not free, seem to be particularly entertaining! You can also print off zombie targets of lesser quality here http://www.etsy.com/shop/FUBARmerchandise
although I am not sure if your supposed to.... I do!
Also a bunch of good ones posted by a guy here http://www.ar15.com/archive/topic.ht...=158&t=1120650
on the AR 15 forums.