After the war, the bayonet lug was added to a lot of M1 carbines during the arsenal refurbishing procedure. By the beginning of the Korean War, the bayonet lug-Geared up M1 was standard issue. It is currently unusual to find an first M1 carbine with no bayonet lug. The M1 carbine mounts the M4 bayonet, which was based upon the sooner M3 preventing