Thank you for the information. I now have both a 57 and a 57M. I've only shot the 57 in two matches, but it shoots great and I'm getting most of the details sorted out.

The 57M needed a new magazine tube, which I now have. I've only test fired it so far, but looking forward to getting it fully sorted out to shoot in some matches this fall. It's been super hot here in the St Lois area, and now I'm recovering from a COVID infection. Really looking forward to cooler weather and a chance to shoot both of these rifles in more matches.

Thanks again,

Steve.