Well I have been putting them through their paces. Both on their own, as well as the 9mm inside the .40 frame. Still I havent had any issues with either of them in any way. I still havent had a mag drop issue from the .40 either.

If anyone ever comes up on 9mm barrels for the shield, please let us all know. It probably isnt going to be any time soon, but hopefully oneday someone will start selling them. I have a few buddies that also want the 9mm conversion option for plinking on the weekends.