I have compiled a list of the Sig Sauer recommended procedures for the Classic Pistols in the following table. This is by no means a complete list of troubleshooting steps but is a good starting point for the most common issues that you may encounter.
In Filming the Sig Classic Series we point out the difference between the old and new style of trigger bar springs and that they install exactly the same. However, the question can the old and new style of Sig Classic Trigger Bar Springs be used interchangeably still remains.
Since time is limited in our videos we figured that we would answer that question here.