I once took a Model 70 style swivel and rethreaded to fit the front barrel stud. I can't recollect the thread size but the tool shop I went to was able to get the correct die.
Last edited by S99VG; 10/22/16.
"The universal aptitude for ineptitude makes any human accomplishment an incredible miracle." John Stapp - "Stapp's Law" "Klaatu barada nikto"