Continuity: When Curtis is watching the house on the beach, smoke falls out the barrel of his MP5 submachine gun before he fires a shot.
Factual errors: The scope on Curtis's gun is an Aimpoint Comp M series. It does not magnify the image as the movie indicates, nor does it have cross-hairs. Instead, it projects a red dot in the scope showing where the bullet will hit.
Audio/visual unsynchronized: After Scott leaves the convenience store with the shotgun, he approaches the convicts and racks the shotgun, but there's no sound. Then he racks it again and the sound is there.
Continuity: During the staged robbery, after Scott shot the death-row convict with a shotgun, we see him reloading his shotgun while talking to the target lead. There is no sound of the reloading. Then when we see Scott in frame, he reloads the shotgun again, this time with the sound of reloading.
Continuity: When Jackie shows the head of Interpol a police sketch, it is of a man in a hat. When the commander holds up the sketch it is of a bare-headed man. The two sketches alternate during the scene.
Continuity: During the beach house scene, Scott shoots "Essex House Man #1" twice, and the slide on his gun locks back. In the next shot, the slide is locked forward.
Continuity: During the beach house scene, Scott puts the gun in his left hand (behind his back) when he speaks to the #1 man that just entered the house. He then shots him twice with the gun, but it in his right hand.
Continuity: During the staged robbery shootings, the guy dressed as a cop drops the fuel nozzle on the ground. After he has been "shot" and Agent Scott has searched his person, Scott gets into the vehicle next to the gas pump, but the fuel nozzle is no longer on the ground.
Factual errors: Misspelling: The Swedish airplane and the journalist's bag says "Sveriges Nyhetbyrå" In Swedish it is spelled "Nyhetsbyrå".
Continuity: When the red pickup pulls into the parking lot, we cut to a shot through the windshield of the driver getting out. The fuzzy dice hanging from the mirror have already stopped swinging and are hanging motionless.
Factual errors: The gun used by Curtis to give Scott sniper cover at the seaside cabin is a Heckler & Koch MP-5. A submachine-gun meant for close-quarter combat. It is neither designed for, nor is ever used as, a sniper rifle. Its ammunition wouldn't even fly straight if shot through a window.
Continuity: In the bar scene, when the newscast plays, Scott and another soldier talk about Scott's knife as he uses it to cut an apple. He lifts the apple to his mouth, and immediately on a reverse shot, we see the knife at his mouth as he bites a piece of apple.
Continuity: Starting at 38:15 into the movie, when Scott shoots the officer escorting the prisoners, you can see a car in the background heading towards the scene. In the next scene, when Scott stands in the middle of the road looking for cars, the car is not present.
Revealing mistakes: The "scarecrow" that Scott throws from behind the shed to divert the sniper fire is clearly a human stunt double.
Continuity: When Scott tosses the straw dummy to throw off the Sniper in the boat it lands with brown shoes on - when the scene cuts to him sitting behind the boat house he has on brown shoes and the dummy has on black ones.
Continuity: At the firefight at the convenience store, Val Kilmer's character shoots out the windshield of a dark blue sedan that has prisoners in its back seat. The glass of the window collapses almost completely. Soon after, with the star driving it now, the same car has a windshield again, but now it just has one or more bullet holes in it.