1920 PARTS Navy Luger Carbine

[CHARLESL]

Hello forum members
I have an interesting Luger Carbine that i offer up for critical
review . I do not know much about much about lugers much less
Luger carbines. I will try to attach photographs . The luger was obtained about 20 years ago by a relative that has kept it in his
display case. He now is in his mid seventies and wants to sell it .I think it is a beautiful pistol . He says that when he bought it at a Houston Gun Show many years ago he was told that it was a Commercial Luger that was imported to the US .He said it had been made out of surplus parts like old Navy frames .{That is why it has a Navy sight
[ and since it was sent to the us an American crest on the receiver. It has all matching number. The barrel and extension have the full number 48930. The take down , sideplate,toggle on the rear below the site,all have 30. the barrel has germany located just in front of the extension. There is a crown over n on the left side of the receiver and breechblock.
The forearm also has 930 stamped where I have seen others.
The forearm is longer than the normal carbine stock but I was told there was a lot of variation especially since this may have been a request order . Any how if there are any experts that wopuld like to comment I would be much appreciative since my relative is liquidating many of his Lugers and other collectible pistols and rifle that I have been seeing and wishing for years
Thank you very much for any opinions
Chuck Lobrano
I can have more pictures if needed or if these don't attach