The 125 mm 2S25 self-propelled anti-tank gun was developed by the Volgograd Tractor Plant Joint Stock Company to meet the requirements of the Russian Air Assault Divisions. It is understood that prototypes of the 2S25 were completed some time ago but as of 2001 volume production had yet to commence. It is already being offered on the export market as the Russian Army has insufficient funds to purchase this vehicle at the present time. In mid-2001, it was stated that the Volgograd Tractor Plant had been working on the 2S25 for about seven years. It was also stated that the 2S25, which is also referred to as the SPRUT-SD, could operate in the water and still be able to fire its 125 mm gun while afloat. It can also operate in altitudes of up to 3,000 m.
The hull and turret of the 2S25 self-propelled anti-tank gun is of all-welded construction with the crew compartment at the front, turret and fighting compartment in the centre and engine compartment at the rear. Through the frontal arc of 40º left and right the armour provides protection against attack from small arms fire up to 12.7 mm and through the remainder of the vehicle against attack from 7.62 mm small arms fire. Many of the automotive parts of the 2S25 are the same as that installed in the BMD-3 airborne combat vehicle that was also designed and built at the Volgograd Tractor Plant. As of early 2001 the BMD-3 was only in service with the Russian Army. The driver is seated at the front of the hull in the centre and has a single-piece hatch cover and three day periscopes, the centre one of which can be replaced by a night vision periscope. There is an additional seat either side of the driver for the commander and driver as they are normally seated here rather than in the cramped turret when the vehicle is travelling in a non operational area. There is a single hatch cover above their position to enable them to quickly leave the vehicle.
Main armament consists of a 125 mm 2A75 smoothbore tank gun developed at Artillery Plant No 9 at Ekaterinburg and is based on the 125 mm 2A46 smoothbore tank gun installed in the T-72, T-80 and T-90 MBTs. For this lighter chassis application it has been fitted with a new low recoil system. The 125 mm 2A75 smoothbore tank gun is fitted with a fume extractor and a thermal sleeve but is not fitted with a muzzle brake. It is fully stabilised in elevation and traverse. This fires the same family of separate loading ammunition as the 125 mm 2A46 smoothbore gun installed in the T-72, T-80 and T-90 series MBTs. It can also fire a laser guided projectile out to a range of 4,000 m. Maximum rate of fire is quoted as 7 rds/min. The 125 mm 2A75 smoothbore gun is fed by a horizontal automatic loader that is located below the turret. This holds a total of 22 projectiles and charges ready for immediate use. The projectile is loaded first, followed by the charge with its semi-combustible cartridge case. A manual back up loading system is also provided. A 7.62 mm PKT machine gun is mounted coaxial with the main armament and this is fed by a belt of 2,000 rounds of ammunition. Additional 7.62 mm ammunition is stowed externally in boxes on the turret rear. The commander is seated on the right and the gunner on the left with both crew members being provided with roof mounted day/night observation devices and a single piece hatch cover. The gunner also has a sight in the forward part of the turret roof. The commander’s sight is stabilised in elevation and traverse and has a laser sighting device to guide the 125 mm laser guided projectiles onto the target. The gunner’s sight is stabilised in elevation and incorporates a laser range-finder which feeds target information into the ballistic computer. There is an infra-red searchlight mounted externally on the right side of the turret and a smaller infra-red light on the right side of the hull front. There is a standard white light searchlight on the turret roof and a smaller one on the left side of the hull front for driving at night.
The suspension is of the hydropneumatic type and allows the ground clearance to be adjusted by the driver from his seat between 100 and 500 mm in 6 to 7 seconds. The running gear either side consists of seven single rubber tyred road wheels, idler at the front, drive sprocket at the rear and track return rollers. Two types of track are fitted, standard and the wider snow/mud track which reduces the ground pressure of the vehicle. The 2S25 is fully amphibious being propelled in the water by two water jets situated one either side low down at the rear. Before entering the water a trim vane is erected at the front of the vehicle and the bilge pumps are switched on. It can operate in up to Sea State 3 and can also fire the 125 mm gun while afloat over a 70º frontal arc. Standard equipment includes night vision equipment for the commander, gunner and driver and an NBC system. According to the manufacturer, the 2S25 can be air dropped from transport aircraft with the crew inside the vehicle. Optional equipment includes a thermal channel for the gunner’s sight, improved amphibious capability and additional armour protection. A defensive aids suite can also be installed, for example the Russian Arena.
There are no known variants of the 2S25 self-propelled anti-tank gun. Some Russian sources have indicated that the 2S25 chassis could be the basis for a complete family of airborne light armoured vehicles to replace systems based on the older BMD-1/BMD-2 series airborne combat vehicle chassis.
Combat weight: 18,000 kg
Power-to-weight ratio: 28.33 hp/t
Ground pressure: (standard track) 0.53 kg/cm2 (wide track) 0.36 kg/cm
Ground clearance: 100 to 500 mm
Max speed: (road) 71 km/h (water) 10 km/h
Range (road): 500 km
Side slope: 40%
Engine: Model 2B06-2C diesel developing 510 hp
Transmission: hydromechanical/hydrostatic drive
Armament: (main) 1 x 125 mm 2A75 smoothbore gun (coaxial) 1 x 7.62 mm PKT machine gun
Ammunition: (main) 40 x 125 mm (of which 22 are ready for use) (coaxial) 2000 x 7.62 mm Gun control equipment:
Turret power control: powered/manual (by commander) yes (by gunner) yes
Turret traverse: 360º
Gun elevation/depression: +15/-5º (bow); +17/-3º(aft)
Gun stabiliser: (vertical) yes (horizontal) yes
NBC system: yes
Night vision equipment: yes
Status The only operators of the 2S25 are the Russian airborne troops with 24 of these vehicles in service. Serial production starts 2018.