Attaching vertical ASA (2 screws) to Tac rail

[Justus]

I've got a 2-screw vertical ASA with bike grip, and recently sold my Longbow-ready Tac rail. The rail I have now is simply a RT Pro rail with the single hole drilled out. Does anyone have a clear pic of the inside of the Tac rail showing the two holes for the vert ASA? Mine were set diagonally around the single hole. Also, what size should those be drilled?

All help will be appreciated!

[Pneumagger]

tight clearance hole with appropriate counter bore for 10-32 Low SHCS...
#9 (.196) THRU HOLE with nearside 19/64" DIA counterbore at a min depth of .100"

Obviously, you know the spacing of the holes based on the Vert Adapter you're attaching.

[Justus]

Thanks! Got a pic that shows how the two screw holes are set diagonally in the Longbow-ready Tac rail?