Does anyone make a picatinny rail that dovetails into a sig rear sight?

[migkillertwo]

subject. I own a bersa thunder 9 UC, which is built to accept aftermarket sights for the Sig Sauer P226 (Genius design decision IMHO). What I want to do is mount a picatinny rail on my bersa and then put a micro red dot (a primary arms reflex sight or a burris fastfire).

Does anyone know if this is doable?

 

[RedAlert]

I don't think that would be a wise move, mounting a scope and rail on the slide. You would be adding all that weight to the reciprocating weight of the slide. This would have adverse affects on the operation of the action as well as subjecting the scope to shocks it wasn't intended.
Instead, you should look for a scope mount that attaches in place of the grip panel or one that hooks up to the frame. This way the slide would be able to recoil and return to battery properly and your sight would not be subjected to those forces.

 

[Bovice]

SIG has an optic mount that fits all of their classic models with the tactical light/laser rail. It attaches at the bottom of the frame to the pistol's rail, goes around the slide on either end, and rejoins at the top. The slide reciprocates like normal, and you have a rail above it to mount your red dot sight. It won't work for you though.

The FNP-45 tactical has a little docter red dot that rides on top of the slide. It's dovetailed in there just like a normal rear sight. Maybe you can try that.

 

[PO2Hammer]

If your pistol accepts Sig sights, why not just get a mini red dot with mount for Sig pistols like the Leupold Deltapoint and skip the weaver adapter?
Doesn't the Fastfire have a Sig mount?
J-Point?