Once the war, the bayonet lug was extra to many M1 carbines in the arsenal refurbishing method. By the start of the Korean War, the bayonet lug-Geared up M1 was standard issue. It is now unusual to find an initial M1 carbine without the bayonet lug. The M1 carbine mounts the M4 bayonet, which was dependant on the sooner M3 preventing knife and fash