Once the war, the bayonet lug was additional to lots of M1 carbines during the arsenal refurbishing process. By the beginning of the Korean War, the bayonet lug-Outfitted M1 was standard situation. It is now unusual to find an unique M1 carbine with no bayonet lug. The M1 carbine mounts the M4 bayonet, which was dependant on the earlier M3 preventi