Well, I have shipped pistols and rifles via USPS with no problems what so ever. All shipped over night (expensive), signature requiered and insured for full amount. All my local Post Office asks is am I shipping lithium batteries, toxic liquids or perfume (of all things). Now my friend in Calif. went to his P.O. and they specifically asked if there was a firearm in his package (there was). Refused his shipment! Fed-Ex did same to him.
As for lugers, the upper cannon does have serial numbers and can be fired with no lower receiver. Put a round in the chamber and press the trigger bar....BANG! But, I would assume the local P.O. clerk would not know that.
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