My company was the North American distributor for a European company that made less lethal products back in the early to mid 2000's, and they had a flashbang/distraction device that was reusable, you just screwed new fuzes into the top of a reusable metal hull. It had 3 sizes, training, which was loud and hurt, law enforcement, which was really loud and really hurt, and a military one, which was about 1/10 of that charge I think. I still can't believe they used one that large, sort of removes the point of assaulting it with small arms when you blow it apart.
Historically, I agree with MrRipley, Russia/USSR has never been to sentimental when it comes to a 1 to 33% blue on blue rate (or red on red in their case, haha). The last big anti terrorist ops they've run included some pretty crazy stuff, even using nerve agents on EVERYONE, including the hostages. I know if I was a hostage in Russia, I'd be just as worried as the hostage takers, for whom there is NO hope, as their theory is to use tactics as in the video, very "gross motor skill" writ large types of ideas, and a lot less "finesse".