A model 659 should have an alloy backstrap, unless someone installed the optional plastic arched backstrap, which S&W sold as an accessory. The factory alloy backstrap is straight with vertical serrations, I frequently see them for sale online, check the auction sites or post a want ad here in the classifieds....also the plastic arched backstrap is extremely hard to find now, as S&W no longer makes them....
Last edited by grif684; 11-19-2012 at 03:19 PM.
Reason: Add pics
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