Got this from another forum, had to share it here:
M-16 nail gun
DeWalt's lineup of quality powertools just got some shock and awe with this brand-colored M16 "nail gun," the spectacular creation of David Wiggins.
Id just picked up a new (to me) M-16 and was in the process of fixing it up a little. It needed new furniture anyway, so I sourced the safety yellow stock, guard, and grip. Then, I went down to the DeWalt factory service place a few miles from the house to get a sticker. There, I saw they had brand new battery casings, so I picked up one of those too. I got home, found a short magazine, and got to work.
I traced an approximation of the size hole Id need in the top of the plastic casing, and slowly dremeled away the plastic I didnt need. Once done, I epoxied the magazine body into the hole and quickly assembled everything so that I could make sure it all looked right before the epoxy set up. Once the epoxy cured, I took the mag back apart, cleaned up some of the bigger resin boogers, and then masked the top of the mag and hit it w/ some mil-spec glossy black coating (aka Krylon).
Here's an alternative offered by a commenter at its Toolmonger thread:
M-16 nail gun - Boing Boing
Toolmonger » Blog Archive » Update: DeWalt-16
DeWalt Edition M-16 Is Power Tooltastic - Geekologie