Currently, the only P226/P228/P229 trigger bars for sale on Ebay, Midwest Gun Works, and other retailers like Sig Sauer, are the “Super Finish” trigger bars, part number: 1200332-R. They are stamped “473”. These trigger bars will only fit in DAK (double action Kellerman) capable frames.
Most Sig frames require the regular trigger bar, part number: ”Trigger Bar-2” which is often stamped with “801”. The most notable difference, other than the 473 super finish being is very shiny, is the 801 trigger bar is split at the rear (right) and the 473 has no split.
Now the Revenant Arms frames are compatible with both trigger bars.