Yep look for a 1943 or earlier action if your looking at ex German military hardware ,the metal was OK up until the last months of the war but by the end of 43 the tolerances started to become more generous and the external finish deteriorated . The heat treating became suspect on some of the 1945 actions ,we found one that had been hardened all the way through when it was drilled and tapped....it ended up in the scrap bin.