This video from Administrative Results feature one of the iconic SMGs that saw action in World War II and has airsoft versions available in the market --- the MP40... "The development of the MP 40 began in the late 1930s as an improvement over its predecessor, the MP 38. German engineer Heinrich Vollmer designed it to be a more cost-effective and simplified version of the MP 38.

Introduced in 1940, the MP 40 quickly became the standard submachine gun for the German military. Its relatively cheap and easy-to-manufacture stamped steel construction made it suitable for mass production.

The MP 40 featured a distinctive appearance with a folding metal stock, making it compact and easy to carry. Operating on the blowback principle and chambered for the 9mm Parabellum cartridge, it had a magazine capacity of 32 rounds and a cyclic rate of fire around 500-550 rounds per minute.

Widely used among German infantry, paratroopers, and various military units during World War II, the MP 40 gained popularity due to its design and reliability, becoming a symbol of German infantry weaponry.

After the war, the MP 40 remained in service with various armies worldwide and influenced the design of subsequent submachine guns. Its compact design and folding stock served as inspiration for many firearms.

The MP 40 is not without limitations; it was not as accurate as some other contemporary submachine guns, and its open-bolt design made it prone to dirt and debris, affecting its reliability in certain conditions. Nevertheless, it remains a significant piece of military history, symbolizing the tumultuous period of World War II and leaving a lasting impact on popular culture."