Vortex viper & cut slide for g26 combo - TRYBE Defense TRYBE Defense Glock 26 Pistol Slide - Version 2

I bought the combo of the slide and the viper red dot since they had a deal at the time on OP. When I went to install the iron sights the slide, I noticed that it was extremely difficult to install the rear sight, even with the sight push tool. Then when I went to install the red dot, the dot wouldn’t sit into the slide without me having sand out some material. The tolerance on this might be just a bit too tight, this is my first Trybe Glock slide, probably wouldn’t buy it again. Maybe it’s just for this particular optic cut, maybe the RMR version is fine. The design is cool though, looks like it’ll work ok.