I didn't want to hi-jack that post about one on a .22, but this .44 has screw holes under the rear sight to mount an optic, but what I've seen so far is you mount a little 2" (approx.) rail on the top then you can put the optic on that. I would only want the little red dot sight, not a scope, for all I use the gun for. Does anyone have info that I can't find to accomplish this? I'm closing in on 64 and I can see the front sight OK, but I think that dot would be more accurate for me. I couldn't find anything 629-specific, but prices go up over $300. Thanks for any suggestions. Jeff