My insurance agent was a Marine survivor of the Chosen. I have spoken with him about both the M1and the carbine. He stated that the carbine was no better or worse then the M1. The big factor was the carbine had limited range and most of the time the Chinese were on the tops of mountains shooting down at them in the valleys well out of range of the carbines. Both the M1 and the carbine would freeze up if not kept somewhat warm and yes they would have to **** on them to get them free to work properly. Up close the carbine worked as well at the M1 he said.