Great, but it’s not tacti-cool guys - Nikon 40mm ARD Anti-Reflective Rifle Scope Lens

First off, this isn’t an item to keep your lens reflection from giving away your position, like some others have said. They obviously have no idea, probably too many video games.
What this is for, is to keep the suns glare from impeding your vision thru the scope. If you’ve ever shot looking towards the sunlight, or even under very bright conditions, the sun flares in the scope can be a pain. This simply creates a level of shade over the objective lens. You can see thru the honeycomb design with no obstruction in your field of view.