1916 Erfurt "Failure to ****"

[rhuff]

From what I can see, I believe that the breechblock is your problem.....or at least part of it. If it won't hold the firing pin, spring, and guide as it tries to set on the sear, there is no cocking of the firing pin. Also, there looks to be something "off" on the sear bar, or it is just the angle of the photo that gives it that impression.