The truck they are hiding in on the way to Baton Rouge reads "Claremont Interstate Movers". This is a reference to Chris Claremont, who was a longtime writer for several of the X-Men comic books throughout the 1980's.
John Proudstar's tattoo is reminiscent of the chest design on the classic blue and red he wore.
Derived from the face of a clock, "got your six" is military terminology used to indicate that one is covering a fellow soldier's back.