I enjoyed the movie, I have it on DVD.  The Galil is a .308, and the gun handling is superb IMO, but couple of thoughts here:
1. You'd think the Galil shooter would carry more mags than the three he had, one in his rifle, the other in his pocket.  The night before (outside of the hotel) he had shot some at the mafia and the Mexican police so I'll count that as the third, still, would anyone intending to make trouble only carry three magazines?  His shotgun carrying friend has a butt load of shells.
2.  Since it's a movie, obviously they can't be shooting real rounds.  Shooting blanks won't give you recoil so the Galil stays true to the aiming point, also the bullet holes are way too staight and dense, I bet if we pause it to count the holes, they'd probably exceed the Galil's mag capacity.
3.  The way these two shoot their .45, looks to me most of the time they're putting down suppressing fire to keep heads down.  Given the 7 round capacity of the .45, shouldn't they be using something else to do the job?  They must have at least six or seven mags each, a high-cap pistol wouldn't force them to swap out mags all the time.