Im new to the whole USPSA/IPSC Limited class, hell, shooting competitively in general .And this is also my first post on this forum. So please excuse my ignorance. Im currently shooting a Gen 4 G17 in Limited at my local matches. And am looking to step up my equipment to maximize my class opportunities. With that being said, I'm considering a S&W M&P Perf. Ctr 40L ported or a Springfield XDm 5.25 40. So I come to my questions. Is it legal to run a "stock from factory" ported barrel in limited class? Also, is it legal to take my current Gen4 G17 and swap out a G34 ported barrel in Limited class? Any information will be greatly appreciated. Thank you in advance.