Just a heads-up for Shield 45 owners who wish to add capacity to their mags. I've added mag extenders to both the 6rd and 7rd mags that came with my new Shield 45, to make them both 8rd mags. The Hyve +1 extender for the 7rd mag works fine, but the NDZ +2 extender doesn't have enough spring pressure left to lock the slide back after the last round. NDZ is aware of the shortcoming, and according to customer service, they are working on finding a supplier to include a longer spring to be used with their product.
Meanwhile, at first I was going to return the NDZ extender (no one else makes a +2 for the 6rd mag that i could find), but decided to buy the Wolff mag spring for a 7rd mag to use with the +2 NDZ extender. Should be here next week.