Ted Kaczynski, the Unabomber, made this homemade pistol using nothing but crude hand tools in his remote cabin. He made this primitive gun to avoid the DOJ paperwork of having to buy one. It's remarkable in its craftsmanship, but rather dull-looking. In his own words: "few days ago I finished making a twenty two caliber pistol. This took me a long time, for a year and a half, thereby preventing me from working on some other projects I would have liked to carry out. Gun works well and I get as much accuracy out of it as I'd expect for an inexperienced pistol shot like me. It is equipped with improvised silencer which does not work as well as I hoped. At a guess it cuts noise down to maybe one third. It is said that it is easy for machinist to make a gun, but of course I did not have machine tools, but only a few files, hacksaw blades, small vice, a rickety hand drill, etc. I took the barrel from an old pneumatic pistol. I made the other parts out of several metal pieces. Most of them come from the old abandoned cars near here. I needed to make the parts with enough precision but I made them well and I'm very satisfied. I want to use the gun as a homicide weapon".

http://www.thehomegunsmith.com/pics/unabomber.jpg