Looks like that piece of brass slipped through QC at the factory. I've seen that before with Win brass with the color.
I bought a bunch of new 9mm and 40 S&W Win brass to reload. During reloading, I found most of it was short on length by .006" to .011".
Glocks are famous for bulging the brass.
https://www.google.com/webhp?sourcei...=glock%20bulge