Is anyone replying in this thread a US military armorer? I’d love to know who gave him the weapon with the sight installed backwards. I was never allowed to touch an installed optic other than to sight it in. I was never in the US Navy, but in all my training I never got a class on anything but an iron sight for the M16, M4, and M9. How would someone who isn’t a master at arms and probably qualifies on a weapon once, maybe twice a year going to know that someone else installed the sight on his weapon backwards? You don’t even know that it was his issued weapon and not someone else’s who also shot with it backwards.