The VZ–58 knife bayonet was initially made as a forging, however, the manufacturing process was later changed to use investment casting. The press catch is in the crosspiece, eliminating the need for a pommel. However, the lack of a pommel resulted in broken grip scales, as was also encountered with the AKM Type I bayonet, due to the tendency for soldiers everywhere to use the bayonet as a hammer. Later production featured a full-length tang that extended rearward to protect the grip scales.There is a surprising amount of variation in the construction of these bayonets. Crosspiece length; tang length; grip material; and, number and placement of rivets securing the grip scales varied throughout production. Leather scabbards also exhibit many variations in color and surface. In addition to standard types, dress and presentation bayonets exist, along with a vinyl scabbard for use on a chemical/nuclear battlefield. The Finnish M1962 bayonet was closely patterned on the Czechoslovak VZ–58 design.Czech VZ57 Vintage Bayonet and Sheath