My dad ran over thousands of these on his way to the Yalu river in his M-48.
My uncle was in the 24th Division and was one of the first combat units to land in Korea from occupation duty in Japan. He carried an M1 carbine with two 30 round mags tapped together. When he got off the ship they were handing out ammo and some guy handed him five rounds and said try not to use them. WTH!
He ran across communist firearms all the time, mostly mosin’s and burp guns. He said he picked up a nice looking burp gun and lugged it around about two days and decided enough of this boat anchor and tossed it in a rice paddy and unslung the M1 again.