Part is 52mm ID x 44mm tall, just enough rail to the front bolt of most reflex sights into a notch and hang off the back and includes a slot to put a zip tie through to tighten if needed.
You will also need something to increase the friction between the adapter and the finder scope body to keep it from spinning around, anything rubbery or sticky should work (rubber bands, paper tape, electrical tape, etc). I used electrical tape to put 2 non overlapping rings around the scope with the sticky side in and used the zip tie to clamp it.
Part goes between the large end of the finder scope and the stock mount, remove the finder scope and o-ring, slide the adapter on, then reinstall the o-ring and finder scope.
Over tightening of the reflex sight may result in cracking of the print. Use Print settings for high strength such as higher temps and heavy infill.
53mmOD_FinderScope_RailAdapter.stl | 31.5KB |