that I don't see why anyone bothers with an ambi mag release on a pocketgun. It's not like such guns are winning any matches, or like you are likely to survive needing a speed reload of a pocket gun.
You must have massive pockets if you're carrying a PPQ in them...
Know the status of your weapon
Keep your muzzle oriented so that no one will be hurt if the firearm discharges
Keep your finger off the trigger until you have an adequate sight picture
Maintain situational awareness