Nitro,
Yes, your rifle was without any doubt originally made by Steyr as a Greek M1903/14. The stock is also definetly a modified military stock although it may not be its original stock.

Greece was involved in lots of wars but had no ability to manufacture arms, so rifles got re-built several times (basically a Greek MS like yours would have seen use in both Balkans conflicts, WW1, the Asia Minor excursion, WW2 and the Greek civil war). Unfortunately this was more like the russian style of re-furb that invovled mixing everything as required. I have 5 Greek MS and only one has all matching parts.

Having said that, some Greek contract MS were used by the English and Scotish guntrade to build upon (similar to what happened with Mausers), however nothing on yours shows any sign that it was worked on by any English gun builders.

The quickest way to spot a real commercial MS over the Greek MS is that the commercial actioned ones have a externally visible ejector slot cut into the action on the RHS (towards the front end of the split in the reciever). Also Greek rifles have a small 5 pointed start or a cross within a circle (actually a represents ancient Herculean shield) on all the steel components. Also the bolt and the LHS of the action and barrel have a tiny stamp of St. George slaying a dragon.

Richards may not do a full mannlicher style stock but they can definely supply various grades of walnut inletted for the Greek MS.

George