CZ75 Shadow 2 manual safety issue

[Unraveled]

Hi all,
I've bought a CZ75 Shadow 2, and swapped out the flat safety with the extended thumb rest safety.
My dilemma is that, the safety only can be flicked up (on) when the hammer is half cocked. The safety wont move  from fire to safe when fully cocked. Is this normal for the Shadow 2 or have I missed something? I can't remember if this was the same before I swapped out to the extended thumb rest safety.

[ProtectTheSecond]

From the Shadow 2 manual...

https://www.czub.cz/media/attachment/file/c/z/cz_shadow_2_en.pdf

Engaging the Safety
Push the safety up to the Safety-On position (Fig. 5) until the red warning dot is covered. The safety in this position blocks the trigger mechanism and slide, thus preventing the pulling of the trigger and operating the slide.
Since the trigger mechanism has been specifically adjusted, it is possible to move the safety onto the "SAFE" position even if the hammer is placed on the safety notch. In this case, however, it is strongly not recommended to engage the safety because the trigger mechanism might be damaged when cocking the hammer by force or pulling the trigger. If damage to the trigger mechanism occurs, let it be repaired by a certified gunsmith.
Besides the method previously described it is possible to put the pistol into a safety mode and still be ready to fire immediately:
Load the pistol. Grasp the grip, POINT IN A SAFE DIRECTION. With a thumb press on the grooved area (thumb piece) of the hammer, pull the trigger and release the hammer slowly forward (Fig. 6) until it rests on the action or safety notch of the hammer. Release the trigger. Practise this operation very carefully to avoid an accidental discharge! We strongly recommend to practise this operation beforehand with the pistol unloaded!
In this state the pistol is safe for all normal handling and at the same time ready for immediate use.
Please remember that the safest way to secure a pistol is to unload it and store it in a safe place!

Hi all,
I've bought a CZ75 Shadow 2, and swapped out the flat safety with the extended thumb rest safety.
My dilemma is that, the safety only can be flicked up (on) when the hammer is half cocked. The safety wont move  from fire to safe when fully cocked. Is this normal for the Shadow 2 or have I missed something? I can't remember if this was the same before I swapped out to the extended thumb rest safety.

[Unraveled]

While I'd like to thank you for the prompt reply on how to operate a safety,
it still doesn't address the Why, the safety lever won't move to safe when the hammer is fully cocked.

[SPO1SHADOW]

The bump that slides under the sear on the safety shaft needs some fitting. You will need to polish some metal off of the bump until it will just slide under the sear. That is your problem.

[krehmkej]

Shadow nailed it.
Here's a video on doing job:
https://www.youtube.com/watch?v=0qf7EufaSYE

[RaCzech]

I think the answer your looking for is..... on the Shadow 2 from factory you cannot put the safety on when it's in full DA, but you can when it's in half or SA.


Sent from my iPhone using Tapatalk

[breyton490]

I just ran into and solved the issue of the Shadow 2 large thumb safety not engaging when the hammer is fully cocked.  Like the OP stated, the slim safety installed at the factory engaged at both half cocked and full cocked.  When I replaced the slim thumb safety with the provided large thumb safety the safety would not engage when the hammer was fully cocked.  Worked fine at half cock.

I put the thin thumb safety back in and everything worked fine again.  So the issue is the large thumb safety, specifically the area where it engages the small detent on left side of the frame.  This issue is the teeth on the large thumb safety are a bit too large or have too sharp an edge to properly engage the small spring/detent that gives the safety the clicking feel.  There are very small teeth / gears on the large thumb safety.  Comparing these to the slim safety, they were a ever so sharper and maybe a .002 larger in diameter to the slim safety that worked fine.  I also noticed that some of the finish was worn of the slim safety installed at the factory.  Guess there was some fitting on that one at the factory.

I took a small file and took a few very light passes across these teeth / gears.  Thru some trial fitting, I was able to get the large thumb safety to engage both at half and full hammer cock position.  You don't need to mess with the sear or trigger, its the thumb safety that needs some very very slight smiting.   Don't go crazy with the file or sanding.. you really just need to take off 0.001 or less / and or break the edges of these teeth.  You will feel the safety wanting to engage as you get close.  Go slow...

Hope this helps.