Heavy Assault gun SU-100m Published 24.07.2017 at 2200 × 1256 in Heavy Assault gun SU-100m Experienced self-propelled artillery gun SU-100M. Object 416, photo 2014 Developed at Kharkov Plant No. 75 as “Object 416” as a new tank. The project for the Object 416 tank was completed in 1950. In 1951 a prototype was produced. It was not adopted for service. Experienced self-propelled artillery gun SU-100M, 2016 photo.