That seems to be the case when manufacturers release new firearms. As I mentioned with S&W, their Sheild Plus (when first out), M&P 10mm, and even the new CSX I bought, all are lacking additional mags yet on the market. When I bought the SA Hellcat, finding the 13 rounders were near impossible. It seems these companies are great at getting the initial firearms out the door (well SA's HP and in my case their compact 10mm are hard to come by), but getting additional mags seems to take months after announced release of the firearm.