The M1 carbine apparently got a bad reputation in the cold weather in the Korean War, especially at Chosin Reservoir, in November 1950, when the temperature plunged to -35 degrees below, reports of the action jamming , and poor performance of the .30 carbine round in frigid cold, was the lubricant being used on the carbine not suited for this cold of a temperature, and does ammo loose it potential in very cold temperatures, the M1 Garand was more reliable in this cold weather , thanks for all your input ,