I went to "the" guy in the industry for Sig. they are not dropping the MPX, nor are they dropping caliber conversions. Their factory is running at 100% just to make the base models. They can't start making any caliber conversions until supply demand ratio is in the correct position. Using common sense, I estimate less than 20% of owners are interested in caliber conversions, which makes producing them vs. producing a whole rifle, that there is actual demand for, not beneficial quite yet.