I've narrowly avoided shooting the alignment tool for my combro...there is a reason why its bright yellow.
Unfortunately I did shoot my Caldwell on the first day, actually managed to clip it in a PBR 'lazy point and shoot into the backstop' blunder.
Its tough plastic and was just grazed but an 18 grain pellet at 960fps sure does rattle around when you're standing in the shed with a WTF look on your face.
And an hour or so later later a ricochet from my sub-12 came back up the path. Strike 2