Page 814 - Complete Krav maga : the ultimate guide to over 250 self-defense and combative techniques

5. Take your shoulder on the weapon side and push it forward, forcing the barrel

up, then slide your hand up and grab the barrel. You can skip the shoulder
movement and go straight for the grab if you feel that he is not holding on
firmly.

6–7. Take your left hand that is gripping the barrel and drive the barrel towards
the rifleman’s face (similar to an overhand punch). At the same time, pull the
butt of the rifle in your right hand to your right hip.