Not interested, there has to be a reason Glock Inc quit making Gen 4's. I'm not a fan of removable backstraps either. Glock should have stayed with the Gen 2 platform as far as I'm concerned.
Saw one in a LGS today, for some reason they mark the slide with P80, but it was def a Glock product. Price was too steep for me to consider though at $699
Sorry if this has already been discussed.