This equipment consists of a Pz. Jäg. IV chassis upon which is mounted a 7.5 cm Pak 39 (L/48). The chassis is a modified Pz. Kpfw. IV, designed to mount either the 7.5 cm Pak 39 (L/48) or the 7.5 cm Stu. K. 42 (L/70).
The chassis has upper and lower nose plates sloped at 45° and 57° respectively. The all-welded construction of the hull is retained, and this structure is strengthened by limited interlocking of the front plates. The main armament is mounted in the sloping front plate of a squat all-welded superstructure, and is offset 8 inches to the off-side of the center line. The mounting is of gimbal type, and is protected externally by a heavy casting. The superstructure is bolted through angle sections to the lower hull. The sloping sides of the superstructure are extended beyond the vertical hull sides over the width of the tracks, and the rear edges of the floor of the sponsons so formed are locked upon the hull angle section. The rear superstructure and engine cover plates are similar to those of the Pz. Kpfw. IV. Spaced plates of 5 mm armor are bolted to brackets welded to the basic side plates of the rear superstructure sides. The armor is treated with Zimmerit. Mechanically, the vehicle is similar to the Pz. Kpfw. IV, but with small modifications. The final spur gear carries 41 teeth instead of the 40 on the tank. The final drive sprockets are of cast steel with webs of flat section instead of the rounded spokes of the tank sprockets.
SPECIFICATIONS
| Weight | ||
| Length | 19 ft., 4 ins. | |
| Width | 9 ft., 7 ins. | |
| Height | ||
| Ground clearance | 15 ins. | |
| Tread centers | 7 ft., 11 ins. | |
| Ground contact | 11 ft., 6 ins. | |
| Width of track | 15 ins. | |
| Pitch of track | 4 3/4 ins. | |
| Track links | 98 | |
| Fording depth | 3 ft. | |
| Theoretical radius of action: | ||
| Roads | 130 miles | |
| Cross country | 80 miles | |
| Speed: | ||
| Roads | 28 m.p.h. | |
| Cross country | 15 m.p.h. | |
| Armor: | ||
| Front plate of superstructure | 60 mm at 50° angle | |
| Sides of superstructure | 30 mm at 30° angle | |
| Armament | 7.5 cm Pak 39 (L/48) | |
| Ammunition (Rds.) | ||
| Engine | Maybach HL 120 TRM, 320 hp. | |
| Transmission | Synchromesh—6 speeds forward, 1 reverse | |
| Steering | Epicylic, clutch brake | |
| Crew | 5 |
German: p. 34.2 (August 1, 1945)