Viper mk1

The Viper mk1 is a modification of the sten gun with some simplifications inside of weapon including The trigger mechanism and barrel which is welded to the gun making it not removable.[1] The weapon was also fully automatic and there was no semi automatic function on the gun. It was made in the United Kingdom after World War II and was a prototype weapon never used as it was deemed impractical. It was designed for military policeman in post war Germany to be fired one handed. Only one of this gun was ever made and is currently held at the Royal Armouries Museum in Leeds, United Kingdom.[2]