4TP

{{short description|1930s Polish light tank prototype.}}

{{More citations needed|date=January 2017}}

{{Infobox weapon|name = 4TP|image = 4TP.jpg|image_size = 300px|caption = Prototype with unarmed turret|type = Light tank|origin = Poland|is_vehicle = yes|service = 1937-1939 (prototype)|number = 1 (prototype)|weight = |crew = 2}}

4TP, otherwise known as PZInż 140, was a Polish light tank prototype. It was designed by 16 December 1936 by Edward Habich of the Państwowe Zakłady Inżynieryjne works. A light reconnaissance tank, it was to become a heavier replacement for TK-3 and TKS tankettes in Polish service. In addition to light, manoeuvrable chassis, the tank was to feature a turret with one nkm wz. 38 FK autocannon and one ckm wz. 30 machine gun.{{Cite web|title = 4TP - polski lekki czołg rozpoznawczy|url = http://derela.pl/4tpl.htm|website = derela.pl|access-date = 2015-10-19}}

Only a single prototype was built. Extensively tested by the army, it proved a reliable vehicle. However, the army decided that by the time serial production could start, the design would already be outdated, and no serial production followed.