Kardan

Buddy of mine has this gun, he was having the same problems. It is not the firing pin guys, its the locking lug. Stop pulling the pump back, and push forward. The gun has play in it, about an 1/8 inch which is why so many are getting the click and no dent on primer. check your own gun. Does the bolt separate when pulling back vs pushing forward? If so, push forward on the pump. If you're still having issues, take it to a gunsmith. Will post a fix for this when I can get my hands on his again so you won't have to worry about pulling vs pushing the pump while firing.