This gun is from the 1976 sci-fi film “Logan’s Run”. I was able to find some very detailed plans online, including WORKING acetylene blasting models (as in the film)! I used plans from the original prop maker, Richard Coyle. It’s rare when you can find any sort of detailed specs, so this was a joy to work on.
I used styrene plastic and bits of PVC to build the gun.
The entire build can be seen here.