ISU 152-2 - Object 247

The ISU 152 2 is an upgrade of the bunker buster ISU 152, but aiming at an anti tank role. Armed with the massive BL 10

The project was dropped because it came too late to counter the tanks it was built for, and poor gun handling performance due to the massiveness of the gun and the chassis it was based on, where this a for an anti tank Duty.

"The ISU-152-2 was a Soviet prototype self-propelled gun developed in 1944 to enhance the firepower of the ISU-152 against heavily armored tank destroyers like the Elefant and Jagdtiger. Initially armed with the 152.4 mm BL-8 gun, it had excellent penetration but suffered from reliability issues and excessive barrel length, reducing maneuverability. In August 1944, it was upgraded with the BL-10 gun (Object 247), featuring a modified muzzle brake and improved breech, increasing its rate of fire to 3 rounds per minute. However, testing in December 1944 revealed structural weaknesses and limited aiming angles. A final improved version was complet