what is the improvement of changing sear spring

JQIAN

JQIAN

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I have CZ shadow 2 that I have changed most of the springs from Eeman Tech, except sear spring.
What I have changed so far: recoil spring, main(hammer) spring, extractor spring, firing pin spring, firing pin, magazine release spring, trigger return spring.
I can definitely feel the improvement of trigger pull especially for DA.
Now the only thing left in the package is sear spring which I am a little afraid to change because it seems to have lots of work and take apart of lots of parts.
I am just wondering if it's worth to change the sear spring? what kind of the improvement will I see after changing that?
 
I say do it - If nothing else, the process will help you understand how your fire control works. You should get and even lighter trigger pull, if I'm not mistaken (both SA and DA).
 
JQIAN said:
Now the only thing left in the package is sear spring which I am a little afraid to change because it seems to have lots of work and take apart of lots of parts.
I am just wondering if it's worth to change the sear spring?
Click to expand...

I’m about to start the same process but with Cajun’s parts. The Shadow 2 sear assembly is much simpler than the 75 FP safety block models. Basically just the cage, pin, sear and spring.
You have probably seen this already but imo this is one of the best, clearest takedown/rebuild videos out there. The sear cage disassembly and reassembly start shortly after 14:30. I say go for it and let us know how it goes.

https://youtu.be/mOej5riXzOc
 
DSG03 said:
I’m about to start the same process but with Cajun’s parts. The Shadow 2 sear assembly is much simpler than the 75 FP safety block models. Basically just the cage, pin, sear and spring.
You have probably seen this already but imo this is one of the best, clearest takedown/rebuild videos out there. The sear cage disassembly and reassembly start shortly after 14:30. I say go for it and let us know how it goes.

https://youtu.be/mOej5riXzOc
Click to expand...

yeah, I have watched this video couple of times. The guy used a tool which has a tiny hole and magnet to hold the sear spring in place when inserting it to the sear. I am not going to invest any $50 or so to get this kind of one-time-use tool.
He also used a similar tool to place the trigger return spring, I managed to do it without it.
But looking at the sear spring, it's much smaller than trigger return spring, the leg is also much shorter. That's why I am hesitant to take this thing out.
 
JQIAN said:
... That's why I am hesitant to take this thing out.
Click to expand...

Fair enough - If you don't like the look of the process in DSG03's linked video, don't do it. But if you like a challenge:

Clear a larger workspace than you think you need, with good lighting and hard floor surface. Carpet can be a nightmare to try to recover small parts and springs from if you don't know where they went, but can be a great work surface.

Two tips for keeping track of fiddly bits: Use a big dollop of clear grease to help hold everything in place during both disassembly and reassembly, or put everything inside a large clear plastic bag and do all the work inside it.
 
DSG03 said:
Agree about not buying the tool. Here’s the same guy doing it without the tool:

https://youtu.be/0cMyZlwKwrw
Click to expand...

I just got it done within 30 minutes.
Putting back the sear spring is not difficult. The tricky part is actually inserting back the left safety. The last step just got stuck and I had to watch the video again and realized that I had to depress the safety plunger.
But I don't feel big difference though in terms of DA/SA pulls. Maybe the difference is too subtle.
 
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