^^^ What 44 AMP said.
A few years ago, Sarco was selling some deactivated Hi-Power pistols that had been altered to make the inoperable in order to use them for classroom props. In addition to having been painted red, the cam bar (or something -- don't recall exactly how Sarco described it and I'm not a Hi-Power armorer) had been removed or altered, the firing pin hole in the breech face had been welded shut, and a rod/pin had been inserted through the chamber. They could not have been made to fire a live round without some serious work by a knowledgeable individual.
But they required an FFL for purchase (or transfer).