Again very nice example, unusual in that it has the Carbine type mag, most of these have full mags (I had one with that mag) & no mag cut off, because I have had so many I have seen a lot of variation in the actions used, strangely early MLE type actions with no mag cut off & charger bridge, then SMLE type action with OUT charger bridge !

Have you looked at the internals on these to see what is what ?