First thing the plate fit perfectly, but the one I added the gasket and then the optic not one single screw would screw in. So I tried and tried for quite some time took a break came back put the optic on without the gasket put a screw in, turned it and it bit down, which I was amazed, so I kept screwing and went all the way in took the other screw put it all the way in and I had a winner! So one by one I took the two screws out blue Loctite and snuggled back down. Shake awake optic from Amazon works perfectly.