Screamers (1995, Canada | USA | UK | Japan)

The year is 2078.  The man is rebel Alliance Commander Col. Joseph Hendricksson (Peter Weller, RoboCop, 1987), assigned to protect the Sirius 6B outpost from ravage and plunder at the hands of the New Economic Bloc. His state-of-the-art weaponry is known as Screamers: killing machines programmed to eliminate all enemy life forms. Screamers travel underground, their intent to kill announced by ear-piercing shrieks. First they dissect their victims with precision, then get rid of the carnage.  They are lethal. Effective. Tidy.

However, somehow, they mutate,  clone the human form.  Then they start killing their own.