The only Production pistol that's been "officially approved" with FO sights by IPSC is the CZ SP01, because somebody provided 'evidence' to Vince Pinto that the factory will supply the gun to a cusomer with FO sights. The K100 COMES with FO sights whether you want them or not, but it's not been "approved".
You're right....and that's why I like shooting in USPSA rather than IPSC, and have an FO front sight on my XD40.
Less BS, and I like that. 8)