I am a relatively new member who has been lurking for a while

I have recently obtained my FAC and my first purchase was a Winchester P14 that was handed to the British inspectors at the Winchester factory week end the 30th December 1916.
Since then it has obviously had a rather chequered history but the bore is excellent and it certainly shoots a lot better than I can smile2
it would seem that it has been through the Weedon process but the marks under the stock have been removed, Parker Hale 5B sights have been fitted front and rear, but it has 2 wooden discs under the bolt on both sides that I do not understand the purpose of

Any thoughts would be appreciated.