STRANGE parts Artillery 1906 Commercial

[CorporalGungee]

I bought this pistol at auction without knowing about the strange things that exist in this Luger . i was aware that it is a 1906 Commercial frame and mis-matched 7 inch shortened barrel . The two toggle links match the frame . Obvious good project gun or parts gun . I have no idea what to think of the oddities ?

First is the receiver / barrel extension does not have a hole in the back for the toggle axle pin , and there are no proofs or serial number . This part also has a small flat across the chamber from front to back . This part is also fully period type blued and does not look like it was scrubbed of any old markings .

Second is the breech block is in the white and not completed in the manufacture / making machining , and no markings .

Third is the brass rear sight base and the locking bolt that is a composite piece of copper and brass pinned together ; also the breech block pin is brass . These parts all show quality manufacture .