It appears the Sig's turnaround is very fast (2 days at Sig plus the shipping time) and they have redesigned the Firing Pin Lock to work with Geissele SSA triggers, rather than ship a new trigger of some unknown origin.
The Gunsmith Comments say "Performed mandatory carriage assembly upgrade with Firing Pin Lock for Geissele SSA trigger". My Geissele Tricon was still installed.
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