Actually the grooved hammer pre-dated the RM by a wide margin and are found on the early 1917 models so they are not unique to the RM. Knowing the proclivity of S&W not to waste parts I would not be surprised at all to find them on OD's.
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John. SWCA #1586
Last edited by hsguy; 04-15-2010 at 09:06 PM.
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