I've never heard of a 9mm Bolo Mauser. Does the rear sight only go to 500 meters, and is there an Army aceptance stamp on the right side of the barrel extension just opposite the proof mark on the left side? Serial number shouldn't be any higher than about 180K (the contract was for 165K but they evidently made more than that). If the inside of the grips are numbered, do they match the serial number of the gun?