I got to spend a few hours at the range this weekend. A buddy of mine had his 4.5” Sig MPX there. At first glance I wasn’t interested. After I ran a few mags of 9mm through it I loved it. The fun factor was awesome! Evidently they are expensive and very hard to find. I can definitely see one of these in my future. Do any of you own these? I would like to know what your experiences with them have been like. The collapsible stock would make it a great little backpack gun. It would definitely be a fun gun to have but not a need.