The quiet final showdown between the Major and Integra mirrors the final standoff in Violent Cop with the villian lying wounded and shooting at the protagonist who is approaching him guns raised.
the first scene is remarkably similar to the scene in Clockwork Orange where Alex and his droogs beat up the old man beneath the overpass. In Violent Cop, it is a group of young deliquents who beat up the old man and the lighting and local are virtual identical.