A Weapons Personalized with the Name of the Recipient of the Gift..right out of the printer...
3 D printing will revolutionize OUR industries.
No Sales of Printers to Iran..the Norkie...or Red China please.
Smart guys use a remote firing rig the first few times.
http://www.youtube.com/watch?feature=player_embedded&v=u7ZYKMBDm4M
Or use a 3D printer to print the parts and then use the lost wax casting method to cast the parts in steel. A bit of brush up and polish and you have a gun.
I would recommend test firing with some string and surrounded by sand bags though.