Hey Walter. I believe your HD is a "transitional" and has the pre-war N frame hammer (long throw) but it is notched for the sliding hammer block. IMO, you could use a pre-war 1917 hammer and cut the hammer block notch yourself if you can't find an original one.


(Kris beat me to it) A period correct K or N frame trigger should work. Could be a Victory model's trigger would work.

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Guy
SWHF #474 SWCA LM#2629