T-74S1M

The T-74S1M or Páncél Katonai Traktor 43 tonna (PcKTr-43) is a main battle tank jointly developed by Granzery and Elesar as an upgrade of the Stasnovan T-74. It served as the primary battle tank of Elesar until the mid 2000s, and Granzery until the early 1990s. It has received multiple upgrades and remains an important part of both nations reserve and active forces.

Domestic Variants

 * T-74S1M1: Granzerian nomenclature PcKTr-43, is mostly identical to the Stasnovan T-74S1. Models of the T-74S1 were acquired by Elesar prior to the Elesarian Revolution, and were reverse engineered to create a tank design which Granzery and Elesar were able to field in large numbers.
 * T-74S1M2: Beginning in 1986, the Granzerian-Elesarian T-74S1M project (known as PcKTr-43S1 in Granzerian nomenclature) was instituted to allow tank repair plants to locally manufacture and upgrade T-74 tanks within their own facilities. In particular, it was proposed that the Stasnovan-made fire control system be replaced by the Granzery-made TáCéR FCS or by the Elesarian SUO-1 Vojdina. Besides the new FCS, the Bagoly-3 passive night vision devices were installed in the driver's compartment, as was the SNV76 night sight, as well as a laser illumination warning system, anti-laser smoke grenade launchers, solid or modular metal side skirts and the Elesarian-developed VZYRV-1 or VZYRV-2 explosive reactive armour was also fitted.
 * T-74S1M3: an extensive Elesarian upgrade based on T-74S1 developed sometime between the late 1980s and early 1990s and involving use of a new digital fire-control system, proprietary ERA and an uprated powerplant. This formed the basis for a whole line of derivative vehicles. Unlike other variants of the T-74S1, the T-74S1M3 (known in Granzerian nomenclature as PcKTr-42S2) was never adopted by the RDF due to the adoption of the Granzerian Pc-69 Jaguar
 * T-74S1M4: the Axis T74S1M4 (known in Granzerian nomenclature as the PcKTr-42S3) is a comprehensive upgrade of every aspect of the T-74S1 resulting in a tank that only superficially resembles the precursor. The automotive performance was enhanced with the same 1000 hp water-cooled diesel engine found on the Granzerian Jaguar-II. All drive train work was done by the Granzerian firm Geppuska and involved extensive modification of the tank's hull and the driver's compartment. The upgrade added new Elesar-manufactured ERA for protection against HEAT and kinetic rounds impacting the frontal aspects of the turret and hull, and against top-attack ATGMs and sub-munitions with ERA tiles covering the turret roof. Survivability is enhanced with the Elesar-made Osa laser warning system integrated with a series of smoke grenade dischargers on each side of turret, a new fire suppression system, REDA NBC suite and electromagnetic mine plow. The most important improvement in firepower comes from the use of the Vertega Oppirus TVR-3 computerized FCS (it is similar to that used in PcKTr-69 Jaguar) which enables a "hunter-killer" mode of operation; the commander has a panoramic day/night sight with built-in laser rangefinder and thermal camera and can engage targets independently, while the gunner has his own primary sight with thermal channel. The FCS has sensors that correct for thermal distortion of the barrel, the temperature of the ammunition propellant, meteorological conditions, totaling 22 sensor clusters installed at several points on the turret. A new 125/EPpSV-97 APFSDS round was developed for use with the new tank which can defeat 540 mm of RHA at 45 degrees at 2,000 m. The Axis tanks were also equipped with a rear-view camera, a new intercom, navigational system, the DITA 72/97B auto-diagnostic system and improvements to the suspension due to the increase in the weight of the 74S1M4 by 4 tonnes. It was initially rejected by the Granzery Ground Forces due to the continued development of the PcKTr-69 Jaguar, but was eventually adopted by the GGF as a low-cost alternative to the Jaguar.
 * T-74S1M4 ELŐP: Introduced in 2005, the Granzerian PcKTr-43S4 is was developed as an extensive modernization program of the T-74S1M4 with most Elesarian components replaced with Granzerian counterparts to increase ease of mass-production. Most noticeably, the tank is fitted with Granzerian-made Kazamata-2 explosive reactive armor and cage armor that provides protection against RPG rounds. The tank has a new laser warning receiver which notifies when the tank is illuminated by a laser beam and identifies direction of the threat. Then smoke grenades can be discharged to hide the tank. The tank is also fitted with a more powerful 1200 hp Granzerian turbocharged diesel engine. This model is also fitted with a single 30-mm cannon. The existing T-74s in active service have all be upgraded to ELŐP standards by early 2018, and it is planned to have 3,000 baseline T-74S1Ms which are currently in storage upgraded to ELŐP standards by 2022, and in the case of war factories are being retooled to allow mass-production of the PcKTr-43S4 using T-74s in storage. While not a distinct upgrade compared to the baseline T-74S1M4, it has greater ease of manufacture in Granzery as well as capability to engage low flying helicopters with the 30mm autocannon. The gun has also be re-calibred for 128mm for standardization within the Granzerian military.
 * T-74S1M5: Further development introduced in 2014. Upgrades include improved armor, armament, and mobility. The hull armor and cast turret have been upgraded with add-on Granzerian composite second generation TEKNŐ-type armour (similar to what is found on the modern Jaguár-II), equivalent to up to 1100mm RHA (rolled homogenous armor). The protection can also be improved with VZYRV-4 explosive reactive armor. The traditional T-74 autoloader has been replaced with a carousel type and is separate from the crew compartment, where the T-74 autoloader was located. The firepower has been greatly improved with the mounting of the Granzerian PL 115M 128mm smoothbore gun, which is capable of engaging all contemporary Stasnovan tanks. The manned 12.7mm machine gun has been upgraded to be remotely operated. Other improvements include an upgraded fire control system. The tank is proposed to be fitted with a new engine, and was planned to use the 1200 hp engines of the Granzerian Jaguar-II and T-74S1M4 ELŐP. Other improvements include rubber skirts covering the lower hull and the tracks, and new tracks based on those found on the Jaguar-II, which can be fitted with deep wading kits to allow it to ford water obstacles up to 13 feet (4 meters) deep. The upgrade can be applied to any variant of the T-74S1M, from the T-74S1M1 to T-74S1M4, the vehicle was accepted as a final upgrade to the T-74s in Elesarian service and approximately 500 have been upgraded so far, and was also accepted into Granzerian service as the PcKTr-43S5, but plans have not yet been put into place to upgrade the existing PcKTr-43S4s. Also includes the capability to mount the Granzery-made KARTÁCS active defence system, which uses a direct energy blast to intercept incoming enemy projectiles such as ATGMs and RPGs, and allegedly high calibre KE penetrators.
 * T-74S1ME: Export model based off  the T-74S1M5, unveiled in 2017 and intended to be fielded in Axis-aligned states without the capability to field the full S1M5 upgrade. Compared  to the S1M5 it lacks the applique TEKNŐ armour and has less sophisticated Grozyar-manufactured Huzat-B explosive reactive armour, a 1000hp engine, and the same FCS found in the T-74S1M4, other internals are the same as the T-74S1M5.
 * T-97A Korzhev: Based off the T-74S1M chassis, the T-97 Korzhev was developed by Elesar in the early 2000s, and is barely recognisable to the original tank. The Korzhev has an elongated chassis, including seven road wheels, and a new gas turbine engine similar to those used in the Stasnovan T-82 main battle tank. The tank was also designed with a larger turret to accompany the then-in development PL 115M 128mm cannon. In addition to these changes the T-97A features a modified variant of the same FCS and optical suite in the T-74S1M4. It also has thicker frontal armour compared to any other T-74S1M variant and weighs significantly more. Noticeably the turret features a large box-shaped turret bustle, which houses a new autoloader in an armoured ammunition storage compartment with blowout panels, improving crew survivability when the tank is struck.
 * T-97B Korzhev: The T-97B Korzhev utilizes the new PL 115M 128mm smoothbore gun, as well as VZYRV-5 Explosive Reactive Armour and the KARTÁCS active defence system.

Lavikonan Variants

 * M-87: The M-87 main battle tank is a Lavikonan license-built variant of the T-74S1M. It is in service within the Lavikonan National Defence Forces, and a large amount of M-87s has been produced throughout the years.
 * M-87AS: The M-87AS is a more modernized variant of the M-87 main battle tank.
 * M-87AI: Armoured recovery vehicle variant of the M-87, estimated 539 operated by the Lavikonan National Defence Forces.

Operators
Granzery: The Granzery Ground Forces operate have approx. 400 PcKTr-43S3s, 1,100 PcKTr-43S4s, and 200 PcKTr-43S5s in active service. The S5s all serve as part of the 133rd Armoured Combat Regiment. The GGF also has about 1,400 T-74S1Ms in storage. Most in storage are of the PcKTr-43S3 or PcKTr-43S1 type.

Elesar: The Imperial Elesarian Armed Forces operate approximately 7,000 T-74S1Ms in active, of mostly T-74S1M4 and T-74S1M3 type, but with over 500 of T-74S1M5 type. Approximately 5,000 T-74S1M2s are in storage.

Lavikona: The Lavikonan National Land Forces operate 1,936 M-87 tanks.

Oskorev: The Oskorevan National Army operate 35 T-74S1Ms in active, of T-74S1M3 and T-74S1M2 type.

Sytrica: The Sytrican Army operate 68 T-74S1Ms in active, of T-74S1ME, T-74S1M4 and T-74S1M2 type.

Volgaria: The Volgarian Army operates 765 T-74S1M3s and 1,000 T-74S1M4s bought from Granzery between 2018 and 2019. All remain in active service with the Volgarian Armed Forces.