I wanted a sun shade and killflash for my Eotech Holosights that was robust and could take a literal beating as well as stand up to heat concerns. Nothing already existing on Thingiverse fit the bill, so I took two that looked promising and combined them while beefing up the overall assembly.

Print with hex down, use tree supports. I recommend PC, Nylon, or HTPLA. Don't cheap out, use 100% infill and make something that will last.

I've included variants that have been confirmed to fit on a 512 and an XPS2. They may fit on other models, but I don't have anything else to test with. I've also included an option with part of the hex removed for ease of A2 height cowitnessed sights.