Looks like a WW II Imperial Army MG.
Didn’t the Russians have something like this in WWII? I just remember the top-feed.
“Looks like a WW II Imperial Army MG.”
Imperial Japan did use a light gun like the Type 73 in the article - Taisho 92 or something. The British used the Bren Gun, which had a curved magazine very much like the one in the image: required to feed 303 British rounds.
All were descended from the ZB26 (original chambering 7.92x57 Mauser), designed by Vaclav Holek at CZ-Praha and produced at ZB. Various later versions were stolen by Nazi Germany when it took Czechoslovakia. The general design thus saw extensive action on both sides of WWII.
The Bren Gun was widely regarded as the best light gun of WWII. Many were converted to 7.62mm NATO and remained in British service well into the Cold War.