Well it looks to me as if you have a P14 MkI*.
The star is the upgrade mark from the MkI, and the left locking lug should therefore be 0.725" long.
But you write that it is 0.62(5) long, which is the length of the original MkI.
Something is not right here - could you please check the bolt lug again?
The stock is clearly non-original, and appears to have been re-used more than once.
P.S: please note that the battered condition of the front barrel band, also on the inside edge, does not match the smooth edges and face of the fore-end. The band has come off a different rifle to the stock.
There also appear to be markings on the underneath of the barrel* - visible in the same photo (4th in your post). Something that ends in PA ?? A photo of these markings would be useful, as they might give a clue as to re-import or arsenal makeover.
The surface of the rear volley-sight (the fold-down peep sight on the left is much smoother than on the neighboring parts, such as the bolt catch. Because of the relatively exposed position, I would expect at least the same amount of wear here.
I think this is a rifle that has been privately "upgraded" by the fitting of a stock with volley sights. And not all components came from the same donor rifle!
*The mirror-smooth finish on the barrel at this point is also inconsistent with the beaten-up barrel band.