New Swiss Gun...

[CINDERS]

Nice looking example I may be wrong and if so I apologise but comparing a web pic with yours it appears yours may have met with a good bit of sanding.
The ridge of the comb is flatter on yours, as is the pistol grip node, also the mag release area on your rifle looks to have been scalloped then again the angle of the camera may make it appear that way.
My friend shoots a K-31 they are wickedly accurate though you can lose cases pretty easily as it chucks the brass about 8' behind you with a vigorous cycle.