Do you use Glocks for BOTH back-up and primary? - If YES: why and which models? What are the pros and cons? - If NO: why not? What do or would you use instead? please explain. I have seen several postings in BoG forum that say they use Glocks only as back ups. I'm just curious and want to learn more about the concept of primary and back-up. Is this just for law enforcement officers? Does this mean that private owners carry both primary/backup when going around town, or own both but leave one at home? I'm also guessing that the carry laws are different in the Philippines. Thank you as always!