Yes it fits...proper function no. They do fit and lock in place, however they don't feed properly. Most gun dealers will tell you yes, as I have discovered that the majority of them are under the false impression that Beretta 92F series mags fit the storm series guns. The storm series mags are interchangeable between the Cx4 rifle and the Px4 pistols, so long as they are the proper caliber. Just because something fits doesn't mean it's right.....after all, why would Beretta make specific mags for the Px4 if the existing mags from the 92F would do the job? Jack
