[MasterGunner01]

“...how do you get the pattern on the glass, or is that an insert or protective cap under the flip ups.”

That gizmo is called a Killflash filter. It resembles a honeycomb and installs in the objective end of the rifle scope. It is specifically designed yo prevent light reflections off the optics. A reflection off the optics at the wrong time and place can give away the shooter's position.

[going hot]

I have a shade, but this looks promising. Midway has a large assortment for different fittings and budgets. need to experiment.