Update V3 March '23, added side lips for active retention of cover, probably final edit
Update V2 March '23, improved clearance between cover and front of glass

This is a basic cover I made for my Holosun 508T. I used the dummy model by Disco_Rex, with minimal modifications to make sure it clears the window.

Printed in TPU, 2 walls with alternate extra wall, 3 top and bottoms, 18% infill. I print TPU on lower end of temperature range so it remains more flexible, personally used 220C, .16 layer height, .32 line width.

Creality

Ender 3

No

No

.2

15

Print upside down, no supports needed