The ST-1 is a new 8x8 tank destroyer based on the ZBL-09 AFV. Main armament is a 105 mm gun mounted on the centre rear of the vehicle, supplemented by a 7.62 mm machine gun located next to the main gun, a 12.7 mm anti-aircraft machine gun on the turret and eight smoke grenade launchers, four on each side of the turret. The ST-1 is operated by a crew of four including the driver.