Wow, a serious weapon, is it a shotgun? I came across a police (or military - it was hard to tell) action in Rio de Janeiro SV a few years ago. I doubt I'll ever find it again, or perhaps it's been removed. If I find it I'll add it here.
EDIT 6/17/19: Can't believe I found the same street...but it's an updated image, so the police action is gone.
No, but that's a good find, too. "Mine" was a complete crime scene happening as the SV car drove by, a couple of men on the ground with guns pointed at them and another cop looking around the corner...like a TV show! When I was driving my way all over Rio there were many neighborhood police stations with men (and the occasional woman) out on the sidewalk with guns drawn, rather than holstered.