Comparing: A-43 vs. Pz.Kpfw. IV Schmalturm

Developed at Factory No. 183 in 1941 under the designation A-43. The vehicle was to replace the T-34. The A-43 was conceived to feature a torsion bar suspension, a V-5 engine, a new transmission, a commander’s cupola, and front armor enhanced to 60 mm.

In November 1944 the Krupp company presented several avant-projects aimed to upgrade armament of tanks and tank destroyers in service. Among them there was a project of mounting a Panther's Schmalturm (tight turret) on the Pz IV Ausf. J. The project was canceled due to phasing out the Pz IV production.