I like it! A lot. Nicely done.
Daniel, I can only speak for myself, but the idea of carrying a firearm and having an extra magazine would fall into the category of "Better to have it and not need it than to need it and not have it." God forbid I ever find myself in the situation where I actually end up using a firearm in a self defense type situation, but if it ever comes down to that, I would prefer that the firearm functions properly. Sometimes they do not. Many issues are magazine related. Having a second or third magazine available is not necessarily about the amount of rounds of ammunition one can carry on their person as much as it is about having a backup plan, and a secondary backup plan, in a worst case scenario. And sometimes it just boils down to a matter of "because I can."
*joking* Besides, we all know those goddamn zombies aren't going to kill themselves