sig sauer 229 issue

[45ACPKING]

well, it's a clone , not the actual sig sauer, but the top end and hammer/sear/trigger parts are sig sauer parts

here's the problem
was out shooting with my friend today and he brought along his sig 229
first few mags were perfect, love this pistol, might have to get one hehehe

now it is a da/sa and i'm a 1911 guy so my ability to figure out the problem is insufficient.

the trigger, when pulled from double action, occasionally sticks back in the pulled position
a gently nudge and it clicks forward.
it is flawless in single action
we removed the grip on the disconnect side and had a look at how the parts were interacting.
in single action, the trigger bar contacts the disconnect , moving it forward and releasing the sear as it should.
in double action, and only once in a while, the trigger bar post that actuates the disconnect slips under the flange on the disconnect and the trigger binds in pulled position.
we've watched every video we can find on the pistol and can't clearly see how these parts interact in double action

in single action the trigger bar disconnect post does not drop low enough to even come close to slipping under the disconnect flange and functions fine
in double action...... is it supposed to have the same contact on the disconnect flange?
or should it be passing underneath the disconnect flange? if so, I suppose maybe the top of the trigger bar's disconnect post is burred maybe and needs polishing so it won't bind as it passes under the disconnect flange?

we're kinda stumped and I've got to leave soon for the 6 hour drive home

 

[Wolfstrack]

edited

 

[45ACPKING]

thx for the link
not quite the same issue
on my friend's ,the trigger bar post is slipping under the disconnect and binding there

so should the trigger bar post be in full contact with the disconnect at all times in single and double...... or does it drop below the disconnect in double action.
an answer to this would tell me if I need to stone the top of the trigger bar post where it is hanging up on the bottom of the disconnect flange.

I wish I had time to do a quick video of the problem or even post a pic, but I gotta run soon and he'll be left with needing to take his pistol to a smith

 

[Wolfstrack]

edited

 

[45ACPKING]

Does the post on the trigger bar travel down , and under the disconnect as the gun fires in DA? , after it trips the sear?

If so, then the problem is a burr on the disconnect or top of trigger bar post..... At least that's what I'm guessing.... Causing the trigger bar's disconnect post to bind under the disconnect leg or flange as it tries to go back to reset the trigger.
Hmmmmm, I love a good puzzler LOL