My JP Sauer 98 sporter has the same finish,,bright blue receiver,,rust blue bbl. I've seen others with the bright blued receiver.

Same 1/2oct bbl, lever release floor plate and w/o a hinge. DSTriggers in 8x57. I paid $500 recently. But the expert selling it said the bbl was cut off as there was no ramp for the front sight.

I'll have to check mine to see if the DST is part of the guard or a separate unit fitted into the guard.
Thanks for that info.