86 Norsk M4 SLK for use on the caliber .30 U.S. Carbine M1, which Norway designated the Selvladekarabin (SLK).

The Norwegian M4 bayonet is closely patterned after the Wartime U.S. M4 Bayonet-Knife, with the narrow crosspiece and grooved leather grip. Similar in appearance and quality of manufacture to its U.S. cousin, the markings are uniquely Norwegian.

The scabbard is a clone of the U.S. M8A1, before introduction of the metal tip protector. The Norwegian scabbard is marked "U.S. M8A1" in outline letters, however, it was manufactured entirely in Norway.

Production is believed to have began circa 1954 at Kongsberg Våpenfabrikk (Kongsberg Weapons Factory). Both bayonet and scabbard carry the Crown-K factory stamp.