Junk doesn't work with mil-spec receivers & magazines - IMI Defense Ergonomic Over Molded Magwell Grip

Specifically, you have to remove the clip and the screw in order to push it on the mag well from the front.

After you do that you can't remount the little clip and screw at the trigger well until you cut off the two little tabs on the clip so that the screw holes will line up again.

Then when you get the modified clip installed , you'll then find that you cannot mount a mil-spec Magpul AR-15 magazine which mounted in the same receiver just fine, all day long without this magwell grip installed.

If you want to modify all of your Magpul polymer magazines, you can make them work, but I choose not to do that. Rather, I'm sending it back for a refund.

It probably will work with stanag metal magazines, which don't have the polymer stops on the front, unmodified, which as far as I know come with a maximum capacity 30 rounds and I'm working with 40 round polymer mags.

Plus it extends the front of your magazine well effectively out another inch which I don't like on a pistol with a 5 inch barrel and shorter shroud. it could and should be a lot tighter.