I saw this movie in early 90’s. It’s kinda sci-fi horror about villager found alien or interdimensional laser weapon which he use to kill cattle and people. I remember ending: villain with laser got his ass kicked by sheriff (?) and then sucked into portal in cavemine
P.S.: i know about laservkast (1978) but it’s different movie
“The Return” (1980)?
Here is the ending scene, which I think is the one you describe, from YouTube:
https://youtu.be/wKDx0_Eym3I
YES!! Thank you, good sir!
Thank you petyan.
Solved!