I put one of the Cheap China Sports on my M 44 Polish and after some adapting I think it will work now with out loosening up. From what I have seen on the Web Buy one of Darrell's mounts every one seems to be satisfied with them and if they stay solid which all reports say they do than they are worth the extra money. When I can afford it I will be sending Darrell the 60 bucks he wants for the K31 mount. I think the Mosin ones are less. Jim