I have a family member who has health problems that make shooting anything an issue. The more recoil and weight, the more of an issue it becomes. This person has practiced with shooting, but muscle strength and both gross and fine motor control are issues, and they won't get any better - likely worse over time. Currently, the firearms in use are 7.62x39 and 9x19 for rifle and handgun respectively. Neither is optimal, but currently they are usable. I prefer these because the setup I currently have means the three of us all have the same rifle and handgun and ammo. I have considered getting this one person a rifle and handgun in 5.7x28 instead - primarily because of recoil and weight and size of the rifle would be closer to optimal for this person to use. Cost is not as much of a factor as usability is. I am aware of the cost and availability of the ammo. As a fallback, we would retain the current rifle/handgun setup in case of ammo availability issues. Partly because of the health issues, training/practice is not ongoing, but this person would not be a front line defender in a SHTF situation. So I am thinking either a PS90, possibly more than one (maybe an SBR with suppressor for myself) and a Five Seven handgun. Or maybe an AR57 upper for an AR "pistol". I like bullpups better - but I am not sure of the ergos of the PS90. Thoughts? Other options?