Works great, not water proof/resistant! - ADE Advanced Optics APOLLO-PRO Red Dot Sight

This is my second experience with ADE optics and it, so far, is much better than my first! The sight looks and feels well made. The dot is crisp and clear as is the optics glass. The switches work well and are not easily bumped. Shake awake also works quickly and the optic comes on immediately on picking up the firearm. Zeroing was accomplished in the typical fashion. Take a few shots from a stabilized position, in my case a pistol rest, aim dead center, fire a round, reposition the pistol, aim dead center and adjust the sight to the first impact hole. Was rinse and repeat until the pistol hits where the optic is aimed. That said the optic was perfectly sighted in three shots and retained zero through all three 20rnd magazines we fired that day. The ONLY issue I have is that this optic in NOT water proof or resistant, which is disappointing as even most budget optics are!