thanks for the info, I was wondering what the difference in gen 1 vs gen 2, that makes sense, and the tuning makes sense for mags with heavy use and dropping them. MBX seems to be the most popular without a doubt, do most use mags that lock the slide back or do they use comp mags? I have never liked mags that didnt lock the slide back but planned reloads it wouldnt make a lot of difference.