While set in Milwaukee, Wisconsin, the movie was primarily filmed on location in Winnipeg, Manitoba, Canada. None of the film was shot in Wisconsin's most populous city outside of a couple small aerial shots of the city skyline.
Mustafa Shakir's character, The Raven, uses a bladed gauntlet weapon akin to Sheng Fu's weapon in the 1978 Shaw Brother's film A Vingança do Águia (1978). An Avenging Eagle poster can then be seen in the background of the video store during the final fight.
The telephone area code displayed on Marvin's advertisements is 414, which is the correct area code for the city of Milwaukee.