I think it is from improper and carele
of the upper to the frame.
I am not at home but perhaps one of you who has immediate access to a Luger could check (CAREFULLY so you don't damage your gun) that if a complete upper is attempted to be assembled to the lower with the toggle in the up position instead of closed, Doesen't the tail of the toggle run into the center of the rear frame in just such a manner to create these marks when it is brought fully to the rear?
When properly assembled (with the toggle in the down position) this kind of damage is not possible. But since this end of the toggle overrides the center frame during the firing sequence (with the toggle in the up position), it stands to reason that it would run into the rear center frame if assembly is attempted in this manner.
It would be especially possible if the toggle did not have the rear axle installed and was in the "UP" position when it was brought to the rear... I think that would account for the scratches...
Can anyone confirm my recollection of the engineering relationships of the parts?
regards,
John Sabato
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