I have a bersa firestorm with 7 rd mag. I recently bought a 10 rd mag for it but the mag sticks down out of the handle a ways is there a mag spacer that can be put on mag to make it look a little better
Couldn't answer that. However, I'm not a fan of spacers on grips that extend the gripping area further down then needed. Have you thought of cutting the bottom out off the pinky adapter for the 7 rounder allowing it to slide up the 10 rd mag to the grip then having the extra length just extend below the adapter much like I've seen them done on extended 1911 mags?