Does anyone know what this happens to be in terms of parts of a gun, please? Apart from the fact that it seems to be part of the breech (Verschluss), I'm having trouble identifying it.
Thank you, everybody, for your replies, and my apologies for not replying earlier, but I didn't get any notification for some reason. I think it must be a sear, despite the fact that it looks as though my text is also using "Raststollen" for that.