This is a customizable offset telescope mount for a Daisy red dot sight. The mount contains a dovetail for the Daisy. You can change just about all the size parameters.

I printed mine in ABS, as I wanted it black and didn't have black PLA, but I think the greater rigidity of PLA would be better.

No supports needed it is printed with the dovetail vertical.

Note the non-stock adjustment knob, from here: http://www.thingiverse.com/thing:2260780