Engineering:155 mm SpGH EVA

Short description: Slovak 155 mm self-propelled howitzer

155mm SpGH EVA
EVA 155 mm 6×6 Self-propelled Gun Howitzer
Type	Self-propelled gun
Place of origin	Slovakia / Czech Republic - (truck chassis)
Specifications
Mass	6×6: 20.2 t (22.3 short tons). 8×8: 28 tonnes (30.9 short ton) combat weight.
Length	11.2 m (36 ft 9 in)
Width	2.55 m (8 ft 4 in)
Height	3.33 m (10 ft 11 in)
Crew	3
Calibre	155 mm (6.1")
Barrels	52-caliber
Rate of fire	5 rounds in the first minute 13 rounds in 3 minutes
Maximum firing range	41 km (25 mi) with ERFB-BB

155mm SpGH EVA M2
Place of origin	Slovakia
Specifications
Mass	27 t (30 short tons) combat weight.
Length	11.3 m (37 ft 1 in)
Width	2.55 m (8 ft 4 in)
Height	3.3 m (10 ft 10 in)
Crew	3 to 5
Calibre	155 mm (6.1")
Barrels	52-caliber
Elevation	- 3.5°/+75°
Traverse	± 45°
Rate of fire	5 rounds in the first minute 13 rounds in 3 minutes
Maximum firing range	41 km (25 mi) with ERFB-BB over 50 km (31 mi) with VLAP

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 6×6 truck, but the system can be also mounted on an 8×8 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.

Design

Created as a shared project between Konstrukta Defense and ZTS Special, using technology developed for SpGH Zuzana 2. It utilizes a 155mm gun, 52-caliber, achieving a range of up to 41 km (25 mi) using specialized ERFB-BB munition. The firing rate is stated as up to 5 rounds in the first minute, up to 13 rounds in 3 minutes. The vehicle 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 a compact design, low weight and high range, the ability to be transported using C-130 planes, as well as full automation of the firing with minimal crew needed.

Variants

EVA M2

155mm SpGH EVA M3
Specifications
Mass	28 t (31 short tons) combat weight.
Length	11.56 m (37 ft 11 in)
Width	2.55 m (8 ft 4 in)
Height	3.3 m (10 ft 10 in)
Crew	2 to 3
Calibre	155 mm (6.1")
Barrels	52-caliber
Elevation	- 3.5°/+75°
Traverse	± 30°
Rate of fire	5 rounds in the first minute 13 rounds in 3 minutes
Maximum firing range	- 40 km (25 mi) with standard ammunition, - Over 50 km (31 mi) with VLAP ammunition

In August 2024, Konstrukta Defence tested the EVA M2 variant (initially revealed in September 2023 under the 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.

EVA M3

At IDEB 2026, Konštrukta – Defence, unveiled a brand new variant, the EVA M3. The new EVA M3 utilizes a newer, Tatra Force 3 chassis and cabin, unlike the Tatra Force 2 which was used on the previous EVA M2. Visually, the cabins are significantly different between the two, while the EVA M2 had a four-door cabin, the new EVA M3 has a two-door cabin that can fit up to 3 crew.

A large change occurred at the back of the vehicle, while the EVA M2 had two large stabilizing legs, the new EVA M3 has them combined into one and it's smaller. Another difference in the new variant is the way the gun can turn. On the M2, the gun would have to be rotated to its "transport position", and only then could the stabilizing legs be lifted. However, the M3 is capable of turning the gun and lifting the stabilizing legs concurrently.

Potential Developments

Reportedly the manufacturer, Konštrukta – Defence, has announced the development of a lighter variant that would be based on a 4×4 chassis at the recent Polish–Slovak Defence-Industrial Dialogue in Bratislava.

Production

In March of 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.

Operators

Future operators

Slovakia

The Slovak Ministry of Defence signed a framework agreement for the EVA M3 in December 2025. Recently, it was discovered that the Slovak Armed Forces ordered 16 vehicles.

Potential operators

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.

EVA 155 mm on 8×8 truck chassis

See also

• Archer
• DRDO ATAGS
• ATMOS 2000
• A-222 Bereg
• 2S22 Bohdana
• CAESAR
• 152 mm SpGH DANA
• G6 howitzer
• AHS Kryl
• Nora B-52
• PCL-09
• PCL-161
• PCL-181
• PLL-09
• Type 19 155 mm wheeled self-propelled howitzer
• 155 mm SpGH Zuzana
• List of artillery