What is the caliber of your M54?? My late father bought a SG M54 in early 1936, just ahead of the better M70- in .220 Swift with a 26" stainless barrel, he had a Stith scope on it- I rebuilt it with the M70 bolt, bolt stop, 3 position safety, Timney trigger and Blackburn forged and blued steel trigger guard and solid floorplate- As I use it as a single shot for varmints at 300 yards plus ranges, I don't need the hinged drop floorplate of the M70- I have a Leupold Vari-X 111 4x12 scope on it in Buehler mounts- it has had over 5000 (est'd) rounds through it, and the chamber and throat are still crisp and unfouled- I handload with Hornady 50 grainers to about 3750 fps.- I have decimated prairie dawgs in SD with it at 400 yards, from a bipod or rest--Good luck with your M54 project, let us know how the project is progressing as time goes by--
