The special effects must have taken the entire budget, though, because they could not afford to hire anyone to help with veracity when it came to weapons.
First, no one aims, especially the apes. They just throw the rifles up one handed and
Second, no one on either side reloads and they are all firing M-16s on full auto. Seriously, the whole flippin' movie. NO. ONE. RELOADS. The apes spray unaimed rounds on full auto for twenty minutes and overwhelm the humans. The cyclic firing rate for an M-16 is 600 rounds a minute. Hold the trigger down and 30 rounds last 3 seconds.They would have needed to be strong as gorillas to carry the loaded magazines they would have used and they would have been reloading every 3 seconds. Watch how long each magazine lasts:
Third, the humans are supposedly "test firing" all the weapons in the arsenal. Are they zeroing the weapons for accuracy? Are they cleaning and servicing the weapons, then testing firing any that have had problems? No, they're doing mag dumps. Seriously, in a world where all the ammo you will ever have in what you have right now, they pouring it out the barrels for no reason.
And finally, the hero points his rifle at some other humans. After some posturing, they move toward him, and he pulls the charging handle to work the bolt. If it was already loaded, all he did was dump a round. If it wasn't already loaded, what was he doing pointing it at anyone with intent?
I usually give movies a pass on gun handling, shooting while running, etc. This one worked hard to get fully into teh stupid.