@evan I voted "never" because my interpretation of the word "carry" in context of guns (or knives) usually implies a fantasy of "self defense" (or in other words, something you could use to seriously injure someone), and I don't do that.

Now in theory my key ring contains a very small widget that unfolds into a novelty utility knife bottle opener combo that is only useful for opening things. However, I rarely leave the house at all anymore, so it seems my answer would be "never" either way".