自行反坦克炮/坦克殲擊車/突擊炮 【戰車】蘇聯704工程自行火炮原型車。

The video discusses the Kirovets-2 (Object 704), a revolutionary Soviet heavy self-propelled gun designed to replace the ISU-152. While it achieved superior protection and incorporated advanced engineering solutions, it remained a prototype and never entered mass production due to shifting military requirements and the preference for other platforms.