Anti-Reflective Device

This is a simple Anti-Reflective Device (ARD, Killflash) that I designed for a red dot sight that has an outer diameter of 38 1/4 mm. Specifically this one (https://www.amazon.com/gp/product/B010OMQSR2/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1)

I purposely made diameter slightly larger so that I could use electric tape to make a custom snug fit. The honeycomb design is centered so the red dot aims directly though the center of one of the openings.

The purpose of an ARD is the preve