The 2S1 Gvozdika is a Soviet 122-mm self-propelled howitzer. It is essentially a version of the MT-LB APC. “2S1” is its GRAU designation. The alternative Russian designation is SAU-122 but in the Russian Army it is commonly known as Gvozdika (“Carnation”).
The 2S1 can be made fully amphibious with very little preparation, and once afloat is propelled by its tracks. It is NBC protected. The main armament is a 2A31 cannon. The 2S1 is equipped with a mechanical loading system which enables the howitzer to shoot up to 5 rounds per minute.