One Hundred Concepts Holosun Series HexCap™
 
Options:
Holosun 403B
Holosun 503C
Holosun 503R
 
Holosun 403C is compatible with Micro Series Hexcap.
 
The HexCap™ is a ruggedly simple, snap-fit Anti-Reflection Device (ARD) that installs securely in seconds to your red dot sight with no additional hardware. 
 
OHC designed the HexCap™ to be as low profile as possible while maintaining durability for use in the field. Its hexagonal lattice allows you to see through the optic with minimal obstruction while eliminating downrange reflections. 
 
ARDs are nothing new, OHC's HexCaps are just the next evolution designed specifically for your favorite optics to minimize weight and bulk while maximizing light transmission and perfecting fitment.