I've run Taylor FreeLance +6 in Limited Minor for over 25 years, also +10 in Open Major 9x19, in my G17's/G34's and G17l, and +5 for both my G22's and G31's, on OEM Glock mags. They are flawless and bullet proof, but not so easy to remove and replace like Dawsons, Arrendono's and TT, for those that like to clean their mags often. I only take mine apart once a year to change the springs, and have no issues running over 20K a year. Since the mags always drop bullet end down, I drilled a weep hole in the extension to just shake the sand out. Of course if you drop one in the mud, you have to clean it. But that only happens less than once a year in SoCal.