I don't know, but I do know that some police agencies that used to emphasize training when the cops only had six, now seem to rely on the street cops having a lot of ammo so learning to shoot is no big thing. Bad thinking - it is usually the first one or two that count; the number of rounds left in the magazine does not count if the hand holding the gun is cold.
Just one piece of advice. Do as you want with your own pistol, at your own risk. But if you are ever ordered to make ANY changes on, or remove ANY safety device from, ANY issue gun, get it in writing from at least the Chief if not the Mayor (or whatever the elected official is the big boss). Otherwise, if something bad happens due to that change, the white shirts will go into the denial mode and hang you out to dry for "unauthorized tampering" with the guns. You could be looking at manslaughter or negligent homicide and a whole bunch of big dollar judgements without any support because some klutz didn't know how to handle the gun you "fixed".
Jim