Installed SAO and hammer won’t drop

[Blackhawk556]

Bought flat face trigger for my SP-01 w/safety and last night was along night

Bought the trigger from Armory Craft with the hope of converting to SAO. I removed the disconnect or and broke my punch [emoji23]

The screw in the trigger is backed out and not hitting the frame for over travel

I am having trouble getting to the screw inside the frame that is attached to the trigger bar.

Is this screw not tight enough? Why doesn’t the trigger drop?


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[M1A4ME]

For that (tight) pin in the disconnector its a good idea to buy one of those starter punches from Cajun Gun Works.  That should get the pin moving.  Once it starts moving it becomes easier to keep moving.

I'd also recommend a set of those short shaft punches.  The longer and thinner the pin section of a punch is the easier/quicker it is to bend on you.  A shorter pin section won't let you drive a pin all the way through or out but it gets the pin moved a good bit and then the longer pin punch can take it the rest of the way and it's not as likely to bend since all the heavy hammering was done to the short pin punch.

Not saying these are the best, just an example of the punches I'm talking about.

https://www.amazon.com/Grace-USA-Starter-Gunsmith-Accessories/dp/B06XNNX4SH/ref=sr_1_7?crid=PODXSIFZIHBY&keywords=starter+punches+set&qid=1678318551&sprefix=starter+punche%2Caps%2C124&sr=8-7

[Tok36]

Are you clear if the pistol is resetting? Is the Sear moving when you pull the Trigger in Single Action? You can observe this visually by manually pulling the hammer back and holding it, then pulling the Trigger and inspecting the Sear to see if it moves.

In a CZ 75 variant in SAO configuration, the forward/upper set screw can stop the pistol from resting if it is over adjusted.

Either the pistol is not resetting or the Trigger is not making rearward far enough to actuate the Sear and allow the Hammer to drop.

[Blackhawk556]

Are you clear if the pistol is resetting? Is the Sear moving when you pull the Trigger in Single Action? You can observe this visually by manually pulling the hammer back and holding it, then pulling the Trigger and inspecting the Sear to see if it moves.

In a CZ 75 variant in SAO configuration, the forward/upper set screw can stop the pistol from resting if it is over adjusted.

Either the pistol is not resetting or the Trigger is not making rearward far enough to actuate the Sear and allow the Hammer to drop.

When I pull the trigger I don’t see any sear movement


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[Tok36]

To eliminate variables i would completely remove both set screws from the Trigger and see if the pistol is still malfunctioning.

[AZ_GunGuy]

I did an sao conversion on my S2.  There are a few full disassembly/ reassembly videos on YouTube (find a video for your specific SKU).  It really is a matter of following the steps exactly as shown on the videos.  There is only one right way to reassemble the gun in terms of how the parts fit back together.

After your first successful reassembly, you'll start finding ways to do it more efficiently.  But for now I'd say go slow and watch as many videos as you can find.

[Blackhawk556]

I did an sao conversion on my S2.  There are a few full disassembly/ reassembly videos on YouTube (find a video for your specific SKU).  It really is a matter of following the steps exactly as shown on the videos.  There is only one right way to reassemble the gun in terms of how the parts fit back together.

I followed “Sig guys” video and followed everything. Only thing I’m having issues with is tightening the screw inside the gun.


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[Blackhawk556]

I did an sao conversion on my S2.  There are a few full disassembly/ reassembly videos on YouTube (find a video for your specific SKU).  It really is a matter of following the steps exactly as shown on the videos.  There is only one right way to reassemble the gun in terms of how the parts fit back together.

I followed “Sig guys” video and followed everything. Only thing I’m having issues with is tightening the screw inside the gun.


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Here’s video of the issue

https://youtu.be/RQ0LbEtFlNY


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[Andres B]

 Trigger does not reset obviously. You need to back up the trigger screw inside the frame. Or remove it alltogether.
 And do not drop the happer without the slide on.

[M1A4ME]

Don't know how "off" your parts/fit are. 

Hopefully the screw is the culprit and you can fix it with the proper adjustment. 

One time, in a CZ75 Compact I had an issue with a SAO conversion.  The sear/hammer, etc. were okay.  The hammer would cock, the trigger would release it and I got no primer strike.  That was with the screws out of the trigger.  I finally realized the trigger was making contact with the frame inside where you had to have the slide off to see it.  I had to remove the trigger and remove some of the metal off the front/lower part (still up in the frame where you couldn't see it) to allow the trigger to move forward far enough to allow the striker block lifting arm (the problem) to completely reset into position.

Just in case you find removing the screws doesn't get you the troubleshooting results you're looking for.

Don't know if this affects you or not.  See what removing the screw does for the problem.

I didn't remove a bunch of metal here, just enough to get it to work and then reinstalled the screw and adjusted it.



That front face and lower corner is up inside the frame and is not visible when installed in the frame.  Sometimes you just run into a weird issue no one else has had.

[Blackhawk556]

Trigger does not reset obviously. You need to back up the trigger screw inside the frame. Or remove it alltogether.
 And do not drop the happer without the slide on.

What screw are up talking about? The ones on the trigger itself?

If yes, I backed them out to the point when they are almost falling off to eliminate that potential problem


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[Blackhawk556]

Don't know how "off" your parts/fit are. 

Hopefully the screw is the culprit and you can fix it with the proper adjustment. 

One time, in a CZ75 Compact I had an issue with a SAO conversion.  The sear/hammer, etc. were okay.  The hammer would cock, the trigger would release it and I got no primer strike.  That was with the screws out of the trigger.  I finally realized the trigger was making contact with the frame inside where you had to have the slide off to see it.  I had to remove the trigger and remove some of the metal off the front/lower part (still up in the frame where you couldn't see it) to allow the trigger to move forward far enough to allow the striker block lifting arm (the problem) to completely reset into position.

Just in case you find removing the screws doesn't get you the troubleshooting results you're looking for.

Don't know if this affects you or not.  See what removing the screw does for the problem.

I didn't remove a bunch of metal here, just enough to get it to work and then reinstalled the screw and adjusted it.



That front face and lower corner is up inside the frame and is not visible when installed in the frame.  Sometimes you just run into a weird issue no one else has had.

The trigger does hit the frame   I was thinking I needed to shave off some of that area but didn’t want to go that drastic without first asking

What about short reset kit I keep hearing about?


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[AZ_GunGuy]

I've heard of short reset disconnectors.  I'm not aware of an SAO short reset kit.  Mostly you'd use the screws in the trigger for that.

[M1A4ME]

I didn't have to take much at all.  Nothing like the circle to show the area.

The trigger I used was aluminum and sanded off easily.  The threaded screw had plenty of thread left to make a fine adjustment.

It's up inside the frame and cannot be seen from outside/under the frame/pistol.

On mine the trigger/sear reset, but the firing pin safety lifting arm would not.

[Tok36]

   The CGW Short Reset Kit works with CZ 75 variants with an intact Firing Pin Block. This includes DA/SA and SAO configurations with the FPB parts installed. SAO Triggers only allow one to adjust out SA pre travel and over travel. They do not influence SA reset distance. The purpose of the SRS kit is to reduce the SA reset distance while preserving FPB function. With the FPB removed one automatically achieves minimum SA reset distance possible. This is because the FPB requires a certain amount of extra Trigger travel to function. Reducing SA reset distance means the the reset is taking place earlier. This means the pistol requires less forward Trigger travel to achieve reset.

If you wish to test if the Trigger itself is the issue it may be worth while to manually lift up the FPB Lifter Arm to see if the pistol resets.

If the Trigger set screws have been eliminated as the cause of the malfunction, i would check that the Trigger Bar tension is set correctly. Incorrect or imbalanced Trigger Bar spring tension can induce a failure to reset.