Amazing weapon. The Red Army would have units armed with nothing but PPSH-41s. The design was selected in peacetime with an eye to mass production as it was a simple design with 41 parts.
My father told me about the “burp” guns. The sound was very distinctive.
For a little while, I had an NVA K-50 which is their version of the PPSh-41. A great little beast and fun to shoot but I never even thought of carrying it on patrol- distinctive sound and not supremely reliable: the reason I had it was that it failed it’s former owner.
My Father was with the first American battalion to be sent into Berlin after the Russians captured it.
I once asked him what they thought of the Moisen Nagant. He said he never saw a Russian carrying a rifle, they were all carrying those SMGs.
Indeed, the success of the PPSh 41 strongly inspired the design decision of the AK-47. I think the AK-47 would have been a somewhat different assault rifle design had there been more emphasis on accuracy like the AR-15 (M-16) became.
I remember reading where the Red Chinese had some burp guns while reading about the Korean War.
https://www.google.com/search?rlz=1C1CHWL_enUS742US743&q=mattel+burp+gun&tbm=isch&source=univ&sa=X&ved=2ahUKEwiNkabhibbnAhUGJzQIHQ2nDpMQ7Al6BAgJECs&biw=1920&bih=986
I had on of these in semi auto.
Very simple gun
It didn't sound like a burp to me.