I would recommend just getting the 15-22. That is what I'm about to do. I am getting it more for my wife and girls to shoot but even if I wasn't I would just get the second gun. I myself am looking for a good overall magazine too for my AR and handgun in one so hopefully someone has some recommendations. I will say this forum is where I have seen every thing I want to get and usually has a place to get it as well. Good luck and welcome.