Excellent replacement for gen 1 glock - Zaffiri Precision RTS Glock 17 Gen 3 ZPS.2 Pistol Slide RMR Cut

Bought this because i wanted to put an optic on my Gen 1 GLOCK 17. So either i get it cut and holed for 300+ and wait weeks, or buy this on sale for 200. I had read reviews about it not being of spec, not functioning etc, but decided to try. I swapped out the internals on my original Glock to this and all fit with no problems. Took it for a function test and it works! I believe that Zaffirri worked out the problems of their earlier slides. The only thing i noticed is that the firing pin protrude out a bit more on this slide. Didn't bother the functioning of the gun. I am happy with my purchase and will next buy a Holosun optic for this slide.