Eight years after this film's release, Fred Williamson produced, directed, and wrote One Down, Two to go (1982), which reunited him with Jim Brown and Jim Kelly. Williamson conceived the idea to do another sequel during a break between filming The Big Score (1983) and Vigilante (1982). The funding for the film, crew, scouting locations, and actors all came together quickly, and the movie was shot in about a month. Williamson considers that film a true sequel to this one.
The films' stars Fred Williamson, Jim Brown, and Jim Kelly would all go on to star together in Take a Hard Ride (1975), which was released by Twentieth Century-Fox a year after this film. In a way, it was sequel to this film, only in a Western setting.
Fred Williamson and Jim Brown are former NFL players, and Jim Kelly was a black belt professional martial artist.
I'm Gonna Git You Sucka (1988) was heavily inspired by this film. It features Jim Brown, Bernie Casey, Clarence Williams III, and Isaac Hayes. John Vernon plays the main villain and Steve James plays a martial arts expert. One running gag is Roundtree never reloading his gun.
The movie was originally supposed to star Jim Brown, Richard Roundtree, and Ron O'Neal. Roundtree had to pull out due to doing the "Shaft" TV series at the time and O'Neal no longer wanted to do blaxploitation roles.