Welgun

0:0:0 The Welgun was a prototype submachine gun developed by the British irregular warfare organisation, the Special Operations Executive. Although it performed well in tests, it was never adopted, and was produced in small numbers only.

Battlefield V
The Welgun is a submachine gun set to be introduced to Battlefield V in the third Tides of War chapter, Trial By Fire. It was first mentioned in the game files as well as a weapon proficiency dog tag.