M.12-2 replacement hammer

[Les Greevy]

I just picked up a nice M.12-2 from the 1970's, did a trigger job on it and dermmeled the trigger smooth. It shoots very well.
I am considerting installing a replacement hammer to bob.
I know these M.12's have a thinner frame than the other K frames but is there any difference in the hammers from other similar time period K's.
TIA
Les

 

[ImprovedModel56Fan]

Yes. The hammer and trigger and probably some other parts are correspondingly thinner.

 

[steelslaver]

Numerich gives the same part numbers for model 12s internals as the do model 10s.

 

[mmande]

"Numerich gives the same part numbers for model 12s internals as the do model 10s."

This only applies on model 12-4s (1983) and after. Before then, model 12 internal parts were thinner. Model 12 .240" thick. All other K frames .258" thick. It's all explained in the big S&W collectors book.
Mike

 

[Les Greevy]

The hammer on my m. 12-2 is in fact .240" thick.
Thanks for your help.
Les

 

[LoboGunLeather]

Interesting post. 50-odd years experience with S&W revolvers, mostly K-frames and earlier M&P, first I've heard about the thickness differences.

Out of curiosity I pulled out my spare parts and mic'd several hammers. The post-WW2 M&P hammers all measured at 0.265" thickness. The common K-frame hammers of 1960s to early 1980s checked in at 0.262". I found two standard K-frame hammers of the pre-1980s period that are both 0.240".

Sounds like the books got it right!

PM sent to OP Les Greevy.