Make absolutely positively sure it's cracked and not a machining mark or assembly scratch. If you know for fact its cracked, you'll have to replace it & reset your headspace.
Not a big project but critical nonetheless.
Check Midway or ask around here. If you draw blank, drop me a PM. I may have an extra one.
Do a search on barrel swapping. You'll find all the info you need up to & including - "The Great GO / No Go Gauge or Scotch Tape Debate".
Personally, I like new brass & tape myself but that's me.
Good luck with it & Don't shoot it until you replace the nut. If the barrel moves while shooting you'll have real problem.
Frank in Fla
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