I am interested in getting into IDPA and I currently have a stock 19 and was wondering if I would be able to use it or if I need a 17 or 34 to compete. I would like to use the 19 since it is my daily carry and the whole thing about IDPA is Defense pistol. also can I use my current 15 round mags and load them to 10 rounds or do I need to purchase 10 round mags for competition. Wanna kill these ads? We can help!