These are just some iron sights I designed for picatinny rails.

You can fit a piece of 1.75mm filament through the holes to get colored dots. I used glow in the dark pla but the effect isn't very noticeable.

Additional functionality: It can spell OwO when you look through it (like the meme https://www.reddit.com/r/Rainbow6/comments/acki3z/owo/)

The picture were taken with the sights mounted on the Epiliad - MCP: https://www.thingiverse.com/thing:4386051