Littlejohn Adapter



The Littlejohn adaptor was a device that was primarily used to extend the service life of British weapons on armored vehicles during World War II. The adapter was screwed on the end of a weapon and compressed the outer shell of a round when fired, reducing a 40mm round to a approximately a 30mm round. This caused rounds to travel faster with a flatter trajectory. It was developed by František Karel Janeček who brought his knowledge of the squeeze bore principle to the United Kingdom after fleeing from Czechoslovakia. The device was named "Littlejohn" after his father František Janeček who had been working on the squeeze-bore principle in the 1930s.

Battlefield V
The LIttlejohn Adapter is a vehicle specialization featured in Battlefield V, available for the Staghound T17E1. An adapter for the 37mm gun, it increases the muzzle velocity of the weapon but also decreases blast effectivenss against soft targets.