Whew! I whipped thru the photos the first time and misidentified them. And I really liked the one I mistakenly identified as the "older" one better. Which led to the dilemma of whether or not to offer up a semi- apologetic post on constructive criticism and so forth, which I decided in the affirmative. Fortunately, I double-checked, and I like your version more.
Still have one thought, which I assume you've already considered. The girl in your photo looks about 17. By implication, the argument seems to be that minors should be permitted to carry. If that is the focus of your pitch (which, personally, I'd have a hard time getting behind), I think it's an effective photo. But if your focus is pro-CCW generally, I'd pick an older model -- a slightly attractive, semi-professional, woman. Maybe in a domestic setting, maybe with a couple of kids playing in the background.
Or, if I missed the point entirely, please permit me to offer up a lame "never mind," and crawl away to look for a beer.