Ar cover does the job - Burris AR Tactical Anti-Reflective Device

It's an anti-reflective cover. It works. With absolutely no surprise, there was really no surprise! :) This is a solid, well made piece that appears to be machined from Al alloy. Very nice quality and finish.

I'll note that as this is for the Burris 536, the optic comes with an objective shroud that 1) may make this redundant at some level, and 2) does force you to choose the shroud vs. this cover (they both thread onto the optic using the same attach point).

Which brings us to really the only 'con'...and I use that term loosely: the thread pitch is very fine and, combined with the relatively large diameter, means you need to fettle and take care when threading the AR device (or shroud) onto the optic. If you have done something similar previously, this is old news. Just a note for anyone new to the fun.

While OP always offers the best deal, I do think the price on this is a little rich; but it is in line with other, like pieces.