I have a nice M-17 with conventional narrow trigger and hammer that I would like to upgrade to TT-TH. Things were so simple in the old days when one could buy the old forged, color-casehardened parts off the shelf in a blister pack for $20 each. Does anyone more knowledgeable than I know of a current source? The usual suspects, E-Bay and Gunbroker are currently barren. I think I'll eventually find a trigger, but the hammer might be tough. Is it possible to machine/grind a centerfire K-frame target hammer into M-17 dimensional spec? I'm not desperate enough yet to consider MIM parts. Don't even know if they would fit.

I believe they are available at Numrich. See the link below. Probably best to call them and speak with a Rep on the phone to make sure you get the correct parts. Also, remember that new parts will require fitting, and will not "drop-in".

https://www.gunpartscorp.com/Manufac...783.htm?page=4

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Ret. LE, FA Instr, S&W Armorer

Numrich does not show a .500 trigger,,,, Hmmmmmm

does that mean the .400 trigger is the "target" trigger??

This one appears to be the .500" Target version.....

https://www.gunpartscorp.com/Products/315640.htm

__________________
Ret. LE, FA Instr, S&W Armorer

you can get the hammer from Midway:
Smith & Wesson Target Hammer Assembly S&W 17 18 617 648 .500 Blue