Serbia officially presented the 203 mm self-propelled heavy mortar TSMB, designed to destroy bunkers and enemy fortifications.
The system was developed from a modified M-65 howitzer, with an extended barrel, and mounted on a 6×6 chassis with an armored cabin, ensuring mobility and protection. The crew consists of four people, and an automatic loader facilitates handling the shells.
The TSMB can fire up to three 100 kg projectiles per minute, with a range between 6 and 12.5 km, and features a ballistic computer and inertial system to enhance accuracy. The mortar allows an azimuth adjustment of ±23.5°, enabling it to change targets without needing to move, and its maximum road speed is 80 km/h, with an operational range of up to 600 km, favoring “shoot-and-scoot” tactics.
Serbia also developed a complete 203 mm ammunition package, including standard, cluster, thermobaric, and active-reactive shells, capable of reaching impact areas of up to 75 meters. Additionally, it is possible to integrate modular precision fuzes, enhancing effectiveness in urban operations or mountainous terrains.
The system combines firepower, range, and mobility, making it a strategic tool for attacking fortified positions.
Source: Militarnyi | Photo: X @Zbiesu | This content was created with the help of AI and reviewed by the editorial team
However, it turns out that the TSMB (that’s the name of the Serbian 203mm gun) actually uses newly developed 203mm mortar ammunition by the Serbs, rather than the “standard” artillery ammunition of this caliber.
The self-propelled gun is meant to serve as the modern equivalent of the 2S4 for the Serbs. https://t.co/1XN9QiDBRS pic.twitter.com/w79BStX1O1
— Piotr Zbies (@Zbiesu) September 21, 2025
