I've just purchased a Mossberg 940 Pro Turkey. It is Optics ready for rmsc- pattern red dots. I purchased a truglow rmsc- footprint red dot for it as I did not want to drop the coin on a Shield. The screws that came with the sight are too large in diameter. I emailed mossberg service and they could not tell me the screw size for the holes in the receiver, which was pretty weird. I even reached out to Shield, but received no response. So, I figured I give this a shot. Any and all help is greatly appreciated.