After a few here replied, I started to reseasrch more. I "THINK" the issue is that whenever you replace EITHER the magazine or the collapsable stock, you now have a shotgun that meets more than "one" of the evil features. In its original form, it only has a 5 round capacity, and a pistol grip (which is its only evil feature). When you increase the capacity OR change the buttstock, you now have 2 evil features. Once you are in that territory, you have at least 3 pieces to replace. Since the pistol grip and stock are 2 pieces, you need 4. There arent 4 pieces available currently to replace. If Im wrong someone let me know....