Arnold, did indeed ask for a ".45 long slide, with laser sight" in the original Terminator movie. At the time, the laser sight used was movie special effects. There were none that small, at the time the movie was made.
Laser sights did exist, but at the time Terminator was made, technology had only gotten them down to the size of a carton of cigarettes. Real ones didn't get as small as the one in Terminator until many years after the movie was made, and then, they got even smaller...
Nice find on the Longslide. AMT 1911s have a less than stellar reputation for working well. Some do, some don't. I hope yours does.
Good Luck!