I cant really comment much about it all till I can get a few spare mags here to look at one apart, with regard to holding the Web to open out the Slots and the other required Mods but it would have All been So much Easier if Crosman had just made the Slot in the Breech 1/8" Wider and Built the Mags the same?? Lol. I doubt that I will bother making Mags unless I go for Metal ones specially for 25 cal, and even then I think it would just be another waste of My time for No wages.