Freakin' bottomles clips

Love this movie, but goddamn! They probably went through 1,000 rounds easy in the first fight sequence. You'd think ammo would be a much more precious commodity since they're in a quarantine zone and can't just poof in some more. Would've been more realistic to have the operate in a semi-automatic fashion.

I know, I know. I'm looking for logic in a B-Movie where it doesn't belong, but they rarely reload and they're just spraying rounds all over the place.