If you are talking about with the older Trigger Bar Spring, and Inner/Outer Pins, that is a good question. On Sigs website, the picture of the parts kit shows the inner and outer pins, but only the newer style spring. I believe the newer spring requires modification to the older factory "checkered grips" to function properly. To switch over to the newer style polymer grips, which will accept the newer spring, requires the newer mainspring assembly. I understand that they have a small supply at Sig, for their repair shop use on customers weapons.I just bought a 226 that I think was manufactured around '99. In looking for a parts kit, I noticed that they are made for the 226s currently in production.
Is a new parts kit available for the older models?