[solidsnack9000]

The shoe is on the other foot -- we really need to justify the restrictions. Why is it a good idea for cops not to have those guns?

The argument you make about Gen 3 vs Gen 5 Glocks actually suggests there is no reason to restrict the general public from buying them, either. The Gen 5 has duplicate controls for left-handed shooting and is thus safer for some people.

All the points you are making are basically why the laws are dumb -- 10 round magazines are not significantly safer for the public than 17 round magazines, for example -- and no one likes to be subject to useless restrictions. Least of all cops.