This is a remix of https://www.thingiverse.com/thing:6061737 (thank's to the original author)

In the original version the "glass" has to be glued "it is assembled by gluing"

With this remixed version, there is no need of glue. You insert the protective "glass" (polycarbonate etc) into a "groove" of 2mm.
So you need a 2mm thick protective "glass", and you just "slide" it.
(Use the original glass template from R163)

No glue makes the assembly/repair process easier, as you can also replace the protective "glass" very easily on the field if needed.

On the pictures, I applied some "car filler", then some paint on it.

The original design (thank's to the author) fit 99% fine with my HollyWarrior HWO-S1 repro

I printed the way you see on the slicer picture (need few supports)

💡NEW version💡(TPU 3mm) on https://www.printables.com/model/1264414-airsoft-eotech-protector 🕺