Sigma Firing pin spring

[Gazz]

I am trying to put a lighter spring in SV40 slide and am stumped as to how to get at it. I realize that the black plastic piece at the rear of the slide needs to come off but can't seem to get it to budge. I have depressed the magazine safety interlock button and pushed the striker/FP forward hoping that that would release the black plastic but no such luck. What is the secret? The manual says not to take it apart any further so that is no help. Thanks for any advice or suggestions

 

[Gazz]

I am trying to put a lighter spring in SV40 slide and am stumped as to how to get at it. I realize that the black plastic piece at the rear of the slide needs to come off but can't seem to get it to budge. I have depressed the magazine safety interlock button and pushed the striker/FP forward hoping that that would release the black plastic but no such luck. What is the secret? The manual says not to take it apart any further so that is no help. Thanks for any advice or suggestions

 

[OKFC05]

Suggest you throw away the reduced power spring, as FTF is very common with them, and they don't do much to reduce trigger pull.

 

[scottaschultz]

I agree 100% with the previous poster. Here is my reply to pretty much the same question on another site:

I have a 9mm Sigma and my only real concern about all these people wanting to lighten up the trigger, especially first time handgun owners, is that this gun was designed to be a service weapon, NOT a target pistol. It was not designed to be shot for hours on end. Of course your index finger and arms will get tired with a pull this heavy after extended use.

When you modify a gun away from spec, don't be surprised when you don't get the satisfactory results. Even Wolff tells you, "Warning: For competition use only - not for duty use." That should be a major tipoff! In other words, if you fall off that rock and break your leg, don't come running to me!

Don't get me wrong, I can certainly appreciate the appeal of a genuine Smith & Wesson pistol for $300.00, but don't make it into something it is not. This gun has been out for awhile and there are plenty of reviews out there so there is no excuse for not knowing what you are getting into. The trigger pull issue is well known, but yet, you (whoever you are) bought one anyway!

OK, so lets assume you knew nothing about the gun before you bought it, why would you keep it if you found it tiresome to use because of the trigger pull? I understand that you own it and now you want to try and make it work better. I get that. With this mod, however, you are not necessarily making the pistol better. If you are lucky and shoot the right ammo, you will have a much more comfortable gun to fire, but don't come back here complaining about misfires.

In my opinion, life is too short to shoot something that you don't like to use. Why not just sell or trade the Sigma and take your lumps. Most major dealers are sold out on this model so you should have not problem getting rid of it.

After you do that, promise yourself that you will do a better job of researching your next purchase BEFORE you lay your cash on the counter. Better yet, see if there is a range that rents guns. That way you can "test drive" a variety of weapons without having to make a long term commitment. Or if you are not shy, see what others are shooting the next time you go to the range and ask to shoot a couple of rounds. Using one or all of these methods, there is no excuse for owning a weapon that does not suit your needs.

[/RANT] off

OK, I will get down off my soapbox... for now!

Happy Shooting!
Scott

 

[Gazz]

Thanks for the replies. It's not my gun (and I probably would never buy one) but belongs to a friend and this is what he wants. While I will certainly relay this information to him, I am still would like to know how the spring is changed. Can anybody tell me?

 

[Gazz]

Thanks for all the advice on why this is not what you would do if you owned the gun. The owner still wants the spring put in as he does want to target shoot with it. He could not figure out how to do it and neither can I. My guess is that none of you who have replied to my post do not know how to do it either. I myself would have never bought the gun unless it was to inexpensive to pass up and I would have told him the same. But that is not the case. So how does the striker spring come out for cleaning?

 

[scottaschultz]

If you still insist on butchering (IMHO) a perfectly fine pistol, there are instructions on the Midway website: http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=295637

Scott

 

[Gazz]

Thanks for that information Scott. Once again, not my gun and not what I would do.

 

[Gazz]

Using the directions from Midway, the change is vey easy - I did it in about 10 minutes. Certainly something that could be undone if it did not work as any shooter might hope. Why so many of you have your panties all in bunch over it, I cannot understand. So what if somebody wants to experiment with their pistol? Maybe not something that should be done to a pistol that is carried by somebody who puts himself in harms way as a matter of course but why not for the plinker or paper puncher? Thanks again Scott.

 

[scottaschultz]

You're welcome!

These firearm forums are really no different than the amateur radio, photography and model railroad boards I participate in. People tend to be very passionate about their hobby(s) and are therefore usually very opinionated about them.

The bottom line is that we want you to be safe and not endanger yourself or anyone else (unless they really deserve it!) and most of all, enjoy yourself. That is why I made the comment about life being too short to shoot something you don't like.

We have all made mistakes and the best we can hope for is to learn from them and try not to repeat them in the future.

Happy Shooting!
Scott

 

[Gazz]

Wrong again? Where was I wrong before? Seems like you are anxious to persecute me for something. Is that what makes you feel good?Like I have already said, the change was easy once I knew what had to be done. Have I lost springs and spring plungers before while working on guns? Yes, but that certainly is no reason not to work on them, and I have been working on them for about 40 years now. Usually I can figure most things out but this takedown was not so obvious.

 

[Deltaboy]

Go to free Sigma Trigger fix and get it fixed right and fixed for good by S&W. Stop all that shadetree gunsmithing.