Rent Avenging Force (1986)

When Matt Hunter (Michael Dudikoff), a retired Secret Service agent, spoils an assassination attempt on a friend who is running for a seat in the Louisiana senate, he becomes entangled with the Pentangle, a racist terrorist group with ties to big business and right-wing politics. Hungry for revenge, they will go to any length to even the score with Hunter. But when they kidnap his sister, they've messed with the wrong man! On a single-minded mission to find and bring his sister to safety, Hunter will let nothing stand in his way.