sear block SW40F

[krallstar]

Hi there, been getting alot of good info so far. Now i have another question. I hear that these sigmas have a terrible trigger. Mine seems to be pretty good. So i was cleaning this up. Pulled the sear block out to make sure all was well. I have read about removing the pigtail spring and replace the outer sring to help with the trigger. While looking things over i noticed that in side there is only 1 spring. I thought that there is supposed to be 2. Has someone removed the other or did the first gen only have 1.

 

[SW Str8-Shooter]

I'm not 100% sure, but I believe the first gen. sigma only had one sear spring.

 

[cciman]

I know this is an old thread, but I bought a used SW40, and it looks like only the inner spring is present.

Q's:

-Where can I get the original factory spring replacements?

-What are the risks of using just one spring on the sear?

Thanks

 

[OKFC05]

I know this is an old thread, but I bought a used SW40, and it looks like only the inner spring is present.

Q's:

-Where can I get the original factory spring replacements?

-What are the risks of using just one spring on the sear?

Thanks

Parts are not commonly available new for the SW, but there are the usual used parts sources.
The only failure mode for weakened or partially removed SW sear springs is the possibility that the sear might fail to reset with hot ammunition if the slide closes before the sear rises. If your gun is working well with your ammunition and the sear resets every time, I would not mess with it.

 

[Dangerman]

its not an issue with the 40f. Those have heavier slides and it slows things down a bit. Try polishing your plunger. The early sigma had very rough firing pin blocks and gave a lot of that gravel trigger feeling to the trigger. If its still not good enough after that you can try polishing the rough area inside the sear.

I would suggest you upping the recoil spring pound wise as the early sigmas have a bit of a problem with splitting frames. The early sigmas had some pretty rough edges. Feedramps were rough. Extractors were not fitted etc. etc.

other tips...

do not dryfire it. contrary to belief here dry fireing sigmas, sds, m&ps , glocks etc. etc is hard on the striker. The early sigmas were some of the worst in this area. S&W will tell you its OK and when it breaks they will make you send the whole gun in instead of selling you a striker. In fact.... do dryfire any gun. Its just a bad habbit to get into. Most guns cannot handle it in the long run. Only one I can think of offhand is the ruger p89 and I still dont do it...again....because its a bad habbit to get into.

download,you magazines. The early sigmas had magazines with a weak baseplate that likes to let go and spray rounds. It was fixed later with a slightly beefier lower profile plate.