In this area of Pennsylvania most, if not all, of the officers buy their own rifles, and most buy their own handguns, as well.
The only time I ever saw a Calico carbine in use as a police gun was up here. I was shooting with a couple of officers at the range one day (I had gotten to know them through the newspaper) and the Calico barfed out the trigger group.
Next time I saw that cop he had a Winchester lever action in .357 Mag. :)