Though I'm not completely certain on this point, I have a vague recollection of quite possibly seeing this one either on television and/or video back in the day. I say that because its top three stars -- Kay Lenz, Richard Hatch, and John Saxon -- were acting giants for those of us who trafficked in genre projects at that time, so I would've sought this one out in whatever venue possible. Hatch, of course, was put onto the SciFi/Fantasy map in the role of 'Capt. Apollo' from the original incarnation of Glen Larson's Battlestar Galactica; and I knew the lovely Kay Lenz from any variety of TV projects. John Saxon? Well, if you don't know the name John Saxon, then you just lost your Fanboy Card: you can turn in the sombrero on your way out the door.
Written (in part) and directed by Terry Marcel (also of 1980's Hawk The Slayer fame), the film also starred Peter O'Farrell, Ray Charleson, and Kenneth Hendel. According to our friends at IMDB.com, here's the plot summary:
"Three people are transported into a parallel reality, where they find they must use modern technology, but medieval weapons, in order to save the citizenry from a murderous warlord."
As always, thanks for reading ... and live long and prosper!