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Regardless of the metal type/finish, I would never consider ordering a Remlin 336 sight unseen, or buying one online, w/o a hand's-on personal examination for any possible defects - like:
Sights out of plumb with the bore C/L
Lack of rifling in the bbl
Ill-fitted magazine tube
Loose forend
Ill-fitted buttstock @ the rear tangs.
Life's too short (for me, now) to have to deal with warranty issues.
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