"Grant Money"
Remember this every time you see some asinine form of state or local spending. Often times the inane purchases were made wholly or in part with grant money. The grant money comes with strings attached (thou shalt use this treasure for the purchase of X doohickey), and can lead to some truly odd spending/procurement decisions.
When you look at things in this light, they often make a twisted form of sense. The grant money is free (for the local agency, that is), and so what if they don't need 100 M-16s...they can get them by writing a letter to XYZ federal agency. Viola, 100 M-16s that no one needed, no one wanted, but were free for the taking. Nevermind that the local PD is short on cars or has poor radios- there were no grants for that.
Now, when you look at the big picture, it makes no sense whatsoever. The local agency isn't footing the bill for it, sure...but you are. M16s don't grow on trees. Thats your federal taxes at work.
Take for instance my local PD. We are chronically short of cruisers, criminally short of radios...and yet we manage to get all kinds of wacky new toys that, frankly, we don't really want or need (engraved whistles, a uniform parts replacement policy thats kinda like organized looting with paperwork). Grant money.
Mike