When Lyle and Michael are discussing both being in the Marine Corps; Lyle refers to Michael as "soldier" and at the end of the same conversation Micheal calls Lyle, "soldier." It is unlikely that either marine would refer to another Marine as "soldier," but would call him or her "marine", "jarhead", "leatherneck" "devil dog" or even "gyrene" instead.
When Nicholas Cage's character and the woman hop the train from the cemetery the train engine is shown to be a Southern Pacific locomotive. In the parting shot of the train going down the track the locomotive is an MRL locomotive.
Red Rock, Wyoming, is supposedly 50 miles east of Medicine Bow. Near the end of the film, a deputy announces that he's 'called for backup from Laramie and Rawlins.' Within moments (even allowing for movie time), several police cars show up to chase down 'the man from Texas.' Given Red Rock's supposed location, it would be around 80 miles from Laramie and over 100 miles from Rawlins. So how did those cops get there that fast?
When Lyle shoots the window out of the car, the next shot shows the hammer of the automatic pistol down. Firing the weapon would have caused it to be cocked. Additionally, no cartridge shell was ejected; in reality, one would have hit the windshield on the inside of the car.
It appears Hopper had an automatic pistol that he had fired once in shooting out the windshield. Cage was aware that the magazine clip had been removed from the weapon that ended on the seat of the car, placed there by Walsh who picked up the weapon from the ground and was retrieved by Boyle before taking it on the train with Cage. it seems there should have been a round in the automatic's cylinder even though the clip was removed. I do not know much about weapons but I thought people got killed daily by weapons they believe are empty because the clip was removed.It seems it should have fired once at Cage when the trigger was pulled.