The Severed Arm (1973)

Trapped in a cave, five men cut the arm off of another companion in order to ward off starvation. After they are saved, their victim seeks revenge on them one by one.

Director:

 Tom Alderman (as Thomas S. Alderman)

Writers:

 Tom Alderman (screenplay) (as Thomas S. Alderman) , Larry Alexander (story), 3 more credits »

Stars:

 Deborah Walley, Paul Carr, David G. Cannon - via IMDB 

https://archive.org/details/THESEVEREDARM