https://t.me/pravdaGerashchenko_en/34046
Russian convicts from the Storm Z unit drank too much brew and opened fire at a group of their fellow soldiers. They immediately shot back at them in a friendly manner. One was killed, a few wounded, the rest just beaten and tied up.
Maybe the gun makes that “ah-ooo-ga” sound and a flag pops out of the barrel with “BANG” written on it?