The 2S34 "Chosta" is a Russian modernization of the Soviet-era 2S1 "Gvozdika" self-propelled artillery (SPA) platform to coincide with changing battlefield requirements of the new Russian Army. The vehicle fulfills an important role in the Army by supplying heavy mobile artillery fire at range with a variety of ammunition types at its disposal. Various improvements to the original platform have been introduced to keep the vehicle a viable battlefield component and make her an essentially new design.
The vehicle maintains the same low-profile and dimensions as the 2S1 including its running gear. There are seven road wheels to a track side with a front-mounted drive sprocket and rear idler. There are no track return rollers present. The engine is fitted to the front-right of the hull with the driver at the front-left. This allows the center-rear of the vehicle to seat the traversing powered turret housing the main crew, ammunition stores and main armament. Access hatches along the turret roof line allow entry/exit for the turret crew. The driver is granted a vision block and access hatch at his position as well as a hinged armor panel. The engine is exhausted through a port along the front-right side of the hull. The glacis plate is well-sloped which provides a shallower target. The vehicle showcases a maximum road speed of 60 kilometers with an operational of 500 kilometers thanks to its diesel engine installation.
Key changes to the original 2S1 system include the installation of a new, more potent 120mm 2A80 main gun, replacing the standard 122mm 2A31 series. A new Fire Control System (FCS) is mated to the gun that promises improved accuracy, rate-of-fire and support for more ammunition types at the disposal of the Russian Army (including guided munition types). Two banks of three smoke grenade dischargers have been added to the turret sides allowing the vehicle to screen its own movements in-the-field. A trainable mounting at the commander's hatch supports a 12.7mm anti-aircraft machine gun.
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