I chuckled a bit. Looks like you kind of crowd the rear sight like I did when I had my para FAL. I ruined a pair of Oakley’s last time I took mine out. The rear sight would just kiss the lens on my sunglasses. Didn’t notice it while I was shooting but when I was done the right lens was all scratched to hell. Fortunately for me a member here was kind enough to get me some replacement lenses with his law enforcement discount so I was able to save the glasses.