Model 14-3 Single Action Only from factory

[model3sw]

And see this one, in 1980 to present.

http://smith-wessonforum.com/s-w-re...1-model-14-3-single-action.html#post140109389

 

[Toyman]

A side note about the single action K series. When I went through the armorers school we were advised to order return spring part number 5387 made for the single action kit and revolvers. We were advised it had a lower pound rate that the standard recoil spring. This would allow a reduced double action pull with out cutting the length of the recoil spring.
This was 1979 and now reduced poundage springs are available from many sources.