ZiS-3

Origins

Before the war the Red Army's divisional artillery used several 76.2mm guns, including the F-22 and the F-22USV, which were heavy and slow to produce. Vasily Grabin, chief designer at Artillery Factory No. 92 in Gorky, wanted a lighter gun that could be made quickly with fewer parts. In 1940 and 1941 his team put a 76.2mm barrel with a muzzle brake onto the light split-trail carriage of their new 57mm ZiS-2 anti-tank gun. When war came in June 1941 the factory began making the new gun on its own initiative, before it had been officially accepted. After a demonstration to Stalin and the military leadership in early 1942, it was formally adopted as the 76 mm divisional gun model 1942. The letters ZiS stood for the factory's honorific name, 'named after Stalin'.

Design & Construction

The ZiS-3 weighed about 1,100 to 1,200 kilograms in action, light enough to be pulled by a truck, a tractor or a team of horses, and to be manhandled by its crew of six or seven. It had a split-trail carriage, a small shield, and a muzzle brake that reduced recoil on the light mounting. It fired a high-explosive fragmentation shell of about 6.2 kilograms to a maximum range of roughly 13 kilometers, and a trained crew could fire 15 rounds a minute or more for short periods. Grabin's bureau designed the gun for mass production, with many simple stamped and welded parts in place of machined ones, which cut the hours of labor for each gun sharply. Its high velocity meant that its shells arrived almost at the same moment as the sound of firing, and German troops called it 'Ratsch-Bumm'.

Combat Use

The ZiS-3 was the main gun of Soviet divisional artillery from 1942 to the end of World War II, and it also equipped many anti-tank regiments. Its armor-piercing shells could defeat the Panzer III and Panzer IV at normal combat ranges but not the front of the Tiger or Panther, and in 1943 sub-caliber ammunition with a hard core was introduced to improve its performance. At the Battle of Kursk in July 1943, 76mm guns formed the backbone of many Soviet anti-tank strongpoints, where several guns under one commander were sited to fire together at a single target, with PTRD-41 teams and infantry dug in around them. Crews tried to hold their fire until the German tanks were close or had turned, to hit their thinner side armor. The gun then followed the Red Army west through Ukraine, Poland and into Germany. It was also mounted in the light SU-76 self-propelled gun, of which about 14,000 were built, the second most numerous Soviet armored vehicle of the war after the T-34.

Legacy

Roughly 48,000 towed ZiS-3s were made, figures vary slightly by source, making it the most numerous Soviet artillery piece of the war. After 1945 it was supplied to many Soviet allies. North Korean and Chinese forces used it in the Korean War, and it served in conflicts in Asia and Africa for decades afterward. Many examples stand today on memorials across the former Soviet Union. Grabin's methods of simplifying designs for mass production influenced Soviet gun design for the rest of the war.