According to members on the Sig forum, Bruce Gray is "the" Sigsauer gunsmith. You might email him. He should be able to answer your question.
Here: http://www.grayguns.com/index.shtml
Can an old double-action only 229 be upgraded to the DAK trigger system? Thoughts? Suggestions? Who should do it?
Anyone? Bueller?
According to members on the Sig forum, Bruce Gray is "the" Sigsauer gunsmith. You might email him. He should be able to answer your question.
Here: http://www.grayguns.com/index.shtml
It depends on when the gun was made. If you call sig customer service they will be able to tell you.
click here to get some more info.