Without looking it up, I can assure you DeWalt did not build that "nail gun", just the tool battery, which is interchangeable with all of their tools. Piezo electric nail guns, pneumatic nail guns - all nail guns - are illegal to mod or misuse for projectile shooting of nails. I think it's a modded airsoft rifle or scratch build from AR15 parts, and may not even shoot nails, but perhaps airsoft pellets, mini darts/bolts, or bird shot.