Congrats on the 10/22! They are by far the best semi-auto 22 on the market today. If you want a hi-cap mag, your gonna have to pay a pretty penny due to the AWB and Brady Bill. A 25 or 30rd mag will run you between $30-60. A 50rd mag will run you about $100. I have a 30rd mag, and they are fun as hell to shoot. But they generaly cost too much.