Thank you for the replies!
I’ve checked the action screw spacing again, and it’s approximately 195mm (roughly 7.67 inches). I realize this is too long for a Sako Forester (L579/Medium Action), which is usually around 175mm. Given this length and the right-hand safety, could this be for a Sako 75 Action IV (Long) or Action V (Magnum)?
Also, the inletting has been professionally glass-bedded and has pillars installed. The "screws" I noticed inside appear to be part of the bedding job. Any confirmation on which Sako model this matches would be great!