Will a Gen 3 Slide fit a Gen 4 Lower?

https://www.hoopergunworks.com/product/rock-island-armory-complete-upper-for-glock-17-9mm-w-sights-vortex-venom-compatible-tungsten/

I’m interested in getting an RMR slide but can’t find a good or decently priced Gen 4; plenty of Gen 3 available however. Pic related is the slide im interested in getting.

I am aware of needing a spacer/adaptee but for those who have bought and have done a Gen 3-4 conversion have you had any long term issues?