If you consider that a proper load out for combat is about 300 rounds to start with and spare ammo might bring it to 4 or 500 rounds then that's only
enough for 20 to 30 m-16 or ar-15 rifles in an emergency situation.
It's probably just supplemental rounds for training. One police department can go through that in a day or two at the range.
Speaking of that, the van he loaded the rounds into was probably the one they use to carry equipment to the range.





