What is that one gun you always have with you? (please no caliber war, even though it's guaranteed to happen)
For me, it's been my KelTec P32 (yes, I said KelTec P32) because it's the lightest centerfire pistol I can find, and it has 7+1 capacity, only 9.4 oz loaded. Only 2.8 oz for another fully loaded mag. That's 12.2 oz total for 15 shots. In fact, it's so light, many times I have to 'Terry Check' myself to make sure it's still there. Heavier and bigger caliber guns have come and gone on the belt over the years, but that little P32 has always been in the front pocket or on the seat next to me. Seven shots from it would certainly ruin anyones day.
I've wanted a P32 for a long time but kept buying other 32's and now have missed the boat, can't find one anywhere. First it was the NAA Guardian, Beretta 81, Zastava M70(a PoS by the way), then a Tomcat. All for one reason or another I just don't like to carry any of those. As of right now my Bodyguard 380 is always on me, but the P32 will eventually replace it.