I did the same thing when i owned my Sig 552. The screws are stripped.
Solution: The mechbox has 4 threaded holes in the bottom, but the grip only uses two. I drilled 2 additional holes in the grip, and used the old screws in the new holes, and tapped the stripped holes and used slightly larger screws. So by the end, I had 4 rock solid screws holding on my grip. Needless to say, i never had problems with it again.
Originally Posted by White_knight
your right,when it rains the burger joint across the street does have cats for 4.99$ but that doesnt mean that i can just go get all the grape jelly i want