Very nice fit on carry handle - UTG AR-15 Military Tactical Mount, 12 Slots

Mounting this thing on my standard carry handle was a piece of cake, very intuitive. However, there were no instructions and when I opened the package, two small screws with one washer fell out on my work surface. I have no idea what how those were to be used, and apparently, one washer was missing. I mounted a small scope on the mount and, in good light, can see through the mount to use the fixed iron sights.