Rolly came out of a game this past Friday and asked me what the chances of breaking your rear sight is.
I figured it's around 100000 to 1 million.
None the less, it happened to him on his eotech sight:



Always use protection people!

For newer people: All you have to do is go to a hardware store and buy about a square foot of lucite/plexi-glass etc as well as a good large cutting knife and it's SUPER easy to cut out a similar shape to whatever you're trying to size it into. You just score the lucite, even for circles, and break off the edges until you get a similar form and then just push it into place.
It won't even cost you 10-$20 but can save you $100's in broken sights.

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