Hello
Just picked up an old German P220 that has the newer strut assembly. On dry fire, if I pull the trigger and don’t hand rack the slide to SA, the DA does not reset. It feels like it is stuck and will get caught then reset after I fully release the trigger and pause. Almost like it is getting caught up or a spring is not as strong to push a sear back or something. I have attached a picture of the part that is getting stuck in a delayed reset.

I know there won’t be a situation where I fire the gun and it goes back to DA but no other Sig SA/DA has ever had this issue. Any thoughts for self diagnose before I send it to a Sig Armorer.

You’re saying that your hammer is not resetting? Have you looked at the hammer return spring? I had one fail many years ago that exhibited conditions exactly as you describe. It is also possible that you have hidden debris creating enough friction between parts to keep the sear spring from doing its job.

quote:

Originally posted by gearhounds:
You’re saying that your hammer is not resetting? Have you looked at the hammer return spring? I had one fail many years ago that exhibited conditions exactly as you describe. It is also possible that you have hidden debris creating enough friction between parts to keep the sear spring from doing its job.

The hammer will reset physically and go back in the “rest” position but the trigger itself won’t have the reset click until I fully let go and then wiggle the hammer or trigger. It’s like it is stuck.

Aftermarket grips? Regardless, remove the right grip panel and make sure the trigger bar spring is installed correctly.

Maybe this helps. Both positions are with the trigger reset in DA. One is before it clicks and the other is after it clicks. Not sure what that part is but I have to tap the trigger to get that piece to drop and click.

I can’t tell from the photos what’s going on, but what I’d recommend is learning how to disassemble the pistol fully and do that first. I haven’t checked, but there should be videos available showing how to do that, and it isn’t very difficult. Clean and lube everything and inspect to see if there are any obvious burrs that could be interfering with proper movement of the action parts. It may be that there’s just a bit of debris or something like built-up congealed lube that’s causing the problem.

But we might also benefit from a photo of the right side of the grip with the plate removed. The trigger bar spring is probably not the reason for the problem, but it is and easy check to confirm.

Check out SigGuy on youtube. He's got some extremely helpful videos.

It sounds like you need the rest of the parts for the strut conversion.

New style hammer
Strut and base
Hammer stop and spring.

Parts list from my conversion, already had G10 grips and the hammer.
Hammer-Strut-7
Mainspring-Seat-2
Mainspring-1/#1202830-R
Spring-39 (Hammer Reset Spring)
Hammer Stop #1202686-R

I did the opposite with mine.
I installed an SRT and swapped out the hammer as it was damaged.

Same result, no reset with DA.
Installed the other parts and it works as normal.