350871979355 this is a item number for a rail system on ebay that will allow you to have a above and a below rail by using the available SD40 rail Or there is 2 different dovetail sight mounts out there:
one that is a flat rail;
http://***************/mp-pistol-acc...dot-ready.html
one that RDS's mount straight onto;
http://www.opticsplanet.com/trijicon...esson-m-p.html
Ive been thinking since Ive got my SD9VE with all the goodies you can buy these things from apex and galloway precision and the trigger is down to 4lbs 12ozs that i wanted to get a Dr RDS milled on the slide with suppressor sights put in. Someday...someday...
Talking to you from his Samsung Galaxy S4