[David Wiggins] has sent some info on this DeWALT M-16 gun mod to Toolmonger. Inspired by a picture of an earlier version back in 2003, he decided to go a step further. He already had the M-16 and only lives a few miles from a DeWalt factory service location so he was able to get original stickers and battery casings. After some careful dremmeling and a layer of Krylon, he had the DeWalt-16. Lets be clear, this thing still shoots bullets, not nails.
If modding your M-16 to be a DeWalt power tool is just too manly, you could always go with the Hello Kitty AR-15.