I read quite often on this and similar firearm boards about folks complaining about the restrictions placed upon them in their desire for the biggest, most powerful, silent, automatic, sniper scope equipped, ... firearm they can imagine.
Well I figure a police force is but a collection of folks. Those folks might have the same imaginations as other folks. Unfortunately the police force collective has deep pockets compared to the average folks that post here and can sometimes justify to the budget authority such a purchase. I chuckle when I read on these boards how some guy concealed, or justified, or deceived his wife in the acquisition of some sought after firearm.
I figure folks is folks and the police folks just have a bigger financial base to please their "I wants".