This is self-firing rifle called drip rifle used in the first world war

Drip (or "pop off") rifles were self-firing rifles used at Gallipoli to deceive the Turks during the evacuation of December 1915. A fire was maintained from the trenches after the withdrawal of the last men, by rifles arranged to fire automatically. This was done by a weight being released which pulled the trigger.
rijalarogya added 11 months ago      in Amazing Facts and Videos