Hey
CQB,
Yep, retired this year. I heartily recommend it as soon as you can swing it.
The older DAO guns had longer slides which could better cover the DAO hammers as they were staged (S&W calls it 'located') further to the rear when the slide was cycled. This permitted a pretty short & smooth DAO trigger stroke.
The newer 'conversion' DAO parts are meant to work in guns with 'shorter' TDA slides, which means the slides won't cover the staged hammers as much as with the older DAO guns. The hammers have to be staged rearward to a lesser amount in order to work in the regular TDA guns/slides. This means a longer DAO trigger stroke is required in order to fire the newer DAO 'conversion' guns.
TDA triggers are different than DAO triggers, too.
There are some other issues which can be involved, as well, such as using the proper combination of parts in whatever model pistol is being considered.
For example,a machined hammer must be installed with a machined sear.
A MIM hammer must be installed with a MIM sear.
Improper combination can result in improper contact between the parts.
Then, in DAO guns the disconnector must be installed before the drawbar is connected to the trigger.
Email me again if you ever have questions about that sweet little CS9 of yours.
Did I mention that retirement is great?
Later,
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