 Just a spectacular shootout scene with multiple automatic weapons going off. Were they real guns that were used? They were, but they're also firing blanks. They're not firing, obviously, live ammunition. And the reason you use blanks is that it's the most realistic way you can make a weapon look like it's firing because it actually does fire. It's just no projectile. Wadding sometimes can come out the end of the barrel, but no projectile like a bullet comes out of the weapon, but it sounds like it does.