Surprised to see KAC making one of these. I've always thought they were a gimmicky type add-on. Never experienced any problems using the standard mag release button and I actually find it to be easy to find and positioned perfectly. Maybe for guys with super short fingers, but it's not for me looks or function wise.
Kind of like the guys who used to whine about BAD levers (which I actually do find useful on certain lowers) and the screw possibly coming loose. This just adds that factor times two. I think they're fugly, TBH. Sorry to be so blunt.