155 mm SpGH EVA

EVA is a Slovak-made self-propelled howitzer, developed by Konstrukta Defence and publicly revealed in 2015. The EVA is based on a Tatra 815 6x6 truck, but the system can be also mounted on an 8x8 truck chassis. It is armed with a 155 mm / L52 howitzer and has a maximum firing range of 41 kilometres (25 mi) with ERFB-BB ammunition.

EVA 155 mm on 8x8 truck chassis

Created as a shared project between Konstrukta Defense and ZTS Special, using technology developed for SpGH Zuzana 2. Utilizes a 155 mm gun, 52-caliber, achieving a range of up to 41 km (25 mi) using specialized ERFB-BB munition. Firing rate is stated as up to 5 rounds in the first minute, and 13 rounds in 3 minutes. Carries 24 rounds in automatic magazines ready to fire. The operation is fully automated and can be performed from the inside of the armored cabin. Multiple round simultaneous impact firing mode is supported and the howitzer can be connected to command and control system of a battalion battery.

High mobility is achieved by using Tatra 815 6×6 chassis, however the developer states that there is an option for 8×8. The model presented in 2015 offers range of up to 700 km (430 mi) and speed of 80 km/h (50 mph) using the 6×6 chassis. Dimensions and weight were kept under the limits of C-130, achieving high strategic mobility for the system.

Compared to competing designs of similar concept, EVA offers compact design, low weight and high range, ability to be transported using C-130 planes, as well as full automation of the firing with minimal crew needed.

In August 2024, Konstrukta Defence tested the EVA M2 variant (iniatially revealed in September 2023 under a name BIA). The shooting capabilities, structural integrity, and mobility were all evaluated. This variant is based on the Tatra 815 6×6 and is equipped with an armoured cabin.

The fire control system is processing on its own the firing solutions for the system. It takes into account the weather information, the ballistic, the topography, and the targeting information.The barrel's position is automatically aiming at the target, and an auto-loader is loading the canon.

Malaysia The EVA M2 is among the systems considered by Malaysia to become the next self-propelled howitzers. The Malaysian Armed Forces have reportedly selected the EVA M2 in October 2024 as future self-propelled howitzer.

In March 2026 the Slovak company Koval Systems has officially launched mass production of the self-propelled howitzers.

The company is currently manufacturing superstructure components for the first batch of 16 vehicles.

• Archer – (.mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}Sweden)
• DRDO ATAGS – (India)
• ATMOS 2000 – (Israel)
• A-222 Bereg – (Russia)
• 2S22 Bohdana – (Ukraine)
• CAESAR – (France)
• 152 mm SpGH DANA – (Czechoslovakia)
• G6 howitzer – (South Africa)
• AHS Kryl – (Poland)
• Nora B-52 – (Serbia)
• PCL-09 – (China)
• PCL-161 – (China)
• PCL-181 – (China)
• PLL-09 – (China)
• Type 19 155 mm wheeled self-propelled howitzer – (Japan)
• 155 mm SpGH Zuzana – (Slovakia)
• List of artillery