Mounting mini red dot sights on pistols (GLOCKs in particular) has become very popular. Generally, you have to send your slide into a trusted gunsmith to do the cutout and mounting pin work.
Brownells has worked with Glockworx to stock a line of precut slides for the GLOCK 17. Variants are available for the Doctor (also accommodates Burris FastFire), JPoint, RMR as well as a model for standard iron sights. Regardless of sighting system, all versions of the slide feature front and rear cocking serrations, lowered ejection port, and porting above the front slide serrations. The slides are CNC cut aircraft grade 1704, heat treated stainless steel RC44-46 in a Black DLC coating.