I am truly impressed by this thread. Good material, good ideas and, overall, a good discussion.
One thing you must remember about pro-gun liberals is that we get it from all sides; anti-gun liberals think we're traitors to the liberal cause; pro-gun conservatives think we're either communists or don't exist and anti-gun conservatives think we're Satan's spawn or something. The NRA takes our money but doesn't want to hear from us.
Be careful with some liberals; they are as bad as some conservatives when it comes to their cherished prejudices. If they find out you have a gun, even if you're a cop in some cases, they won't come to your house or allow their children to play with yours.
Other liberals may be amenable to a trip to the range. Based on my experience, one of the most effective guns for this trip is the Walther P22. It's a handgun, the principal bugaboo of the antis, and it's black. But it's small and a lot of fun to shoot. It's not a great target pistol, hunting pistol or the first choice for self-defense: it's just fun to shoot and because of that, it's tough for them to challenge because it doesn't fall under the existing propaganda. Plus it's got that little key lock on the side, a nice safety touch. (You don't need to tell them you have never used it and, in fact, have no idea where the key might be.)
Liberals are not lacking in intelligence nor do they base everything on emotion. That's as deadly an assumption as the one that says all conservatives are social Neanderthals. Liberals certainly are not all socialists or communists. If you want to see what
real socialists think, check out
the Socialist Party-USA or
Democratic Socialists of America. You won't be surprised at what the Socialists think about guns and I think I can pretty well promise that if any of them come to power, you'll find a lot of liberals fighting the good fight alongside the conservatives.
By the way, the analogy with abortion was a good one. Liberals aren't in favor of abortion, per se. They are in favor of the woman's right to choose. Just tell them that when it comes to guns, you're in favor of individual choice without state interference as well.
BTW: Ghoster: That's an interesting strategy but the more likely outcome is they would tell you they would have felt safer if they weren't with someone who drove off and left them.