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PGZ09
The PGZ09 is a self-propelled anti-aircraft gun of Chinese origin. It was developed to supplement and eventually replace the PGZ95 in Chinese service. Compared to its predecessor the PGZ09 has more capable armament and sensors. For several years this vehicles was called PGZ07. It now appears the old designation is incorrect.
PTS-2
The PTS-2 is a late Cold War era amphibious cargo vehicle of Soviet origin. It is a further development of the PTS-M and is based around the newer MT-T tracked chassis. The PTS-2 is a more capable vehicle that is better suited to salt water operations, albeit in calm weather. Although most source indicate a start of production in 1985, these could have been in service as much as a decade earlier.
Steyr RSO
The RSO is a World War 2 era prime mover of Nazi German origin. It was developed early 1942 as a prime mover for towed anti-tank guns and towed howitzers in the Eastern front. Here in the muddy season in 1941 both wheeled vehicles and horse drawn limbers of the German forces suffered significantly. A cheap, yet capable, towing vehicle suitable to difficult off-road conditions was required. With the help of Ferdinand Porsche the Austrian firm Steyr developed the tracked RSO. There also was a wheeled RSO by Skoda, which is described in a separate article. The name RSO stands for Raupenschlepper Ost, describing it as a "tracked towing vehicle for use in the east".
150mm sIG-33
The sIG-33 is a World War 2 era heavy infantry gun of German origin. It was developed in the interbellum based on experience gained during World War 1. What makes the sIG-33 unique is that it was the only large caliber infantry gun in widespread service during the war. Despite obvious drawbacks it was deemed effective and was produced until the very end of the war. This iconic piece of equipment saw action in all German theaters of war. The concept of the heavy infantry gun saw no use after the war.
THE WORLD'S MOST COMPLETE WEAPON DATABASE
WeaponSystems.net provides a full and complete overview of world wide used weapons. This website provides weapon systems sorted by country inventory.