M-42 45mm is a Soviet Anti-tank unit in Steel Division II.
The M-42 was developed by the No. 172 Plant in Motovilikha as an upgrade of the 45 mm anti-tank gun M1937 (53-K). The gun received a longer barrel, shells with more powerful cartridges, and a thicker shield (7 mm instead of 4.5 mm), but one of hinged construction in order to have a reduced profile, which requiring crews to kneel while serving the weapon. Some minor changes were also introduced in order to speed up production.
These guns were used from 1942 until the end of World War II. In 1943, due to its insufficient anti-armor capabilities against new German tanks such as the Tiger, Panther and Panzer IV Ausf H, the M-42 was partially replaced in mass production by the more powerful ZiS-2 57mm anti-tank gun. The M-42 remained in production however, as it was quite effective against lighter vehicles and could pierce the side armour of the Panther and Panzer IV Ausf H.