After the war, the bayonet lug was included to many M1 carbines over the arsenal refurbishing approach. By the start with the Korean War, the bayonet lug-equipped M1 was standard difficulty. It is now rare to find an original M1 carbine without the bayonet lug. The M1 carbine mounts the M4 bayonet, which was based on the sooner M3 preventing knife