Other mistake: When the driver of the ZR1 corvette changes gears the emergency brake lever is visibly up.
Character mistake: Lewis Dinkum tells Deputy Mike Figuerola it's only a .50 cal round that hit him in the shoulder. The rifle he was shot with was a Blaser R93 LRS2 which fires a 338 Lapua round. A .50 pretty much would have torn him in half.
Continuity mistake: When Ray drives through the fields, the headrests inside the Camaro ZL1 show SS instead of ZL1.
Continuity mistake: Just after Cortez got rid of the SWAT vehicles there is a shot from the back of the car driving away from the carnage. The white licence plate with "ZR1" on it (shown earlier) is now missing.
Revealing mistake: Numerous times throughout the movie, we see a dust cloud kicked up by the ZR1, as to be expected. However in some shots from in front of the ZR1 we see a dust cloud kicked up that the ZR1 drives through. This can not be the FBI helicopter as that is a fair distance behind the ZR1. Clearly from the camera van.