5 cm SK L/40 gun

The 5 cm SK L/40 gun was a German naval gun used in World War I and World War II.

Service
The 5 cm SK L/40 gun was primarily used as an anti-torpedo boat gun aboard avisos, corvettes, gunboats, protected cruisers, submarines, torpedo boats, and unprotected cruisers. It was used by the navies of the German Empire, Nazi Germany, Belgium, and The Netherlands.

Ship classes that carried the 5 cm SK L/40 include:
 * A-class torpedo boats
 * Type UB II submarines
 * S7-class torpedo boats
 * S66-class torpedo boats
 * G88-class torpedo boats
 * S90-class torpedo boats
 * Irene-class cruisers