This one doesn't look like any commercial sporter I have ever seen. First of all, it has a small ring action, which otherwise only Kurz commercial rifles had. Secondly, it has no "Mauser Werke AG" manufacturer's legend on the left side of the receiver. Thirdly, the bolt handle knob does not resemble the commercial pear shaped knob. Finally, there are no proof marks visible on the receiver.

I suspect that someone mated an original Mauser take-off barrel with a military action and numbered the receiver to match the serial number on the barrel.