I called the peoples name on the shield they said they never had this problem. Well they checked it out and came back and said they tryed it on a stock case and it would not fit then was told I needed to cut the ears and flange that the dust cover mount to... I really did not want to do that so I called CSR talked to them they said there's would fit. Did not want to spend that kind of money but they had what would work. Thanks :