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It doesn't hurt to have a parts kit. The white spring is what you need.

 

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This one should work:

Wolff Recoil Spring - SIG P225/228/229 - $7.79 - Top Gun Supply

 

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Here's a 3-pack of factory white springs:

Sig Sauer P229 Recoil Spring Set, 9mm

 

[ScalpeL28]

Thank you very much for all your replies and the links. Is the wolff spring better than OEM?

 

[ScalpeL28]

Checked the link from midwest gun works but it is also out of stock, might end up just buying the parts kit directly from Sig.

 

[bearone2]

Thank you very much for all your replies and the links. Is the wolff spring better than OEM?

i don't think so.

 

[bluesjuke]

This one should work:

Wolff Recoil Spring - SIG P225/228/229 - $7.79 - Top Gun Supply

This is now the OEM recoil spring for 229s.

It is the spring that came in my new 229 Legion and I asked Sig about it and was told this.
Function has been good but break in is slow as after 400 rounds I am still only ejecting spent casings about 2 feet.

 

[Firearms Collector]

Try Sig Customer Service, I Got Some back in April.
I'd also get a Parts Kit Too.
I doubt the Legion Springs are any different that the regular ones.

 

[doubloon]

Thank you very much for all your replies and the links. Is the wolff spring better than OEM?

Like bear said, I don't think so.

The spring is a consumable that needs to be replaced occasionally.

As long as it does the job and you keep an eye on it a spring from any reputable source will be fine. But some springs may weaken or wear more rapidly than others even from the same source.

 

[BorderlinePro]

Bought 2 packs from MGW.

https://www.midwestgunworks.com/page/mgwi/prod/RSS-2299

Arrived as advertised.