Fits nothing - IMI Defense Ergonomic Magwell Grip

Didn't fit my lower. I thought it was because I had a Magpul trigger guard.after heavy modification with a dremel, file, sand paper, and razor, I finally got it to SORT OF fit. There is a piece that wraps around the front of the trigger guard and a screw passes through to hold the piece in place. Since I bought two of these, I decided to try the brand new one on a brand new name brand stripped lower just to verify it was in fact the trigger guard that caused the problem. With a COMPLETELY stripped lower, meaning zero trigger guard or any other parts installed, it would require tremendous modification AGAIN to get it to screw together. I have many IMI Defense components and this is the first one that is a complete waste of money. DO NOT BUY. IT WONT FIT. It's way too much money for a part requiring such extensive modification.