Darra Adam Khel

"Darra Adam Khel is a town in the North-West Frontier Province of Pakistan [...] Darra Adam Khel is devoted entirely to the production of ordnance."

http://en.wikipedia.org/wiki/Darra_Adam_Khel

"Hundreds of closet-sized rooms where men and boys make working copies of the entire world's guns with nothing more than hand tools and a small drill press. The tools are astonishingly primitive, yet the forges turn out accurate reproduction of every conceivable sort of weapon, from pen pistols and hand-grenades to automatic rifles and anti-aircraft guns. The copies are so painstakingly reproduced that even the serial number of the original is carried over. A Darra gunsmith, given a rifle he hasn't seen before, can duplicate it in around ten days. Once the first copy is made, each additional copy takes two or three days due to the templates created. Handguns, being more complex, take a little longer."