Factual error: When the guys pop out of the tunnel and start shooting at the guards it shows bullets going into the pool making big splashes. At the angle they were shooting from the bullets would barely skim the water making very little splash if they even went into the pool at all. If these were true ex-Deltas they would most likely have a little better aim than just spewing a line of bullets until they hit someone.
Factual error: During a shootout in a house of the white-dredded Haitian, there is a moment when Will Smith shoots the bad guy right in the eye. Camera enters the barrel of his gloch, and everybody can see the regular cylinder barrel with grooves. But barrels of glochs always have polygonal rifling visually barrel channel is hexagonal, not cylindrical.