My understanding is that the trials resulted in Sig making several updates to the pistol - dunno if those updates were considered Gen 2 or were made to Gen 2 pistols. The current shipping versions seem to be performing well for most folk, although that doesn't much help those that bought into the earlier versions.The BATF trials were with a Gen 2 gun yet is had more shooter and gun induced failures than anyone else in the trials.
It also sucks for the ones that paid 1.5x the current price for the earlier models. A local shop has some listed at $350. This same shop was chosen to liquidate the inventory of a bankrupt shop. They had early versions of the gun for $500. So now they have two of the same guns sitting on the shelf for two different prices.My understanding is that the trials resulted in Sig making several updates to the pistol - dunno if those updates were considered Gen 2 or were made to Gen 2 pistols. The current shipping versions seem to be performing well for most folk, although that doesn't much help those that bought into the earlier versions.