Thank you Igorrock . It took me forever to find information on the M-52 . I finially was able to find a Norwegian website and that is where I uploaded the Norwegian rifle/ Kongsberg hunting advertisement . I have never seen another in the US . The Norwegian captain who sold it to me told me it was never fired . The Kongsberg pad was very hard and the rifle was very long with it on so I removed it and now the length of pull is 13-3/4" which is perfect for me