Hey amddude: A rep for Sig spent a day at our local gunshop and I made a point of being there and asking. He was to contact the "Sig office" but time differences necessitated a call 2 hours later. No real reply, no followup, no nothing. It is fairly obvious that Sig made initial promises they could not keep. I would think they are having tech problems or manufacture problems with the 45 convert but refuse to come to grips with them via their customers. I purchased a 9mm version with the desire to also purchase the 45 upgrade--it has not been available, from what I can see, since the gun's introduction-about 2 years ago. Come clean and offer me my money back. Sorely disappointed. Many other fine firearm mfgrs out there and Sig is not on my list anymore.