I recently got an X-Compact P320, but the grip is a little too short for me. I would like to find a mag well for it to add a little more grip for my pinky, but I haven't been able to find one.
So, until then, I decided to modify a spare full-size grip that I had lying around to match the length of the X-Compact slide. I was inspired by a thread that I read earlier on this forum, but I could not find it again to post my results, so I had to start a new one. Sorry for the duplication.
Here are the rough DIY results: