I have been looking around at pistol caliber carbines like the Sig MPX and others. Is it me or am I missing something. There seems to be a good sized fan base for these but for practical purposes I fail to see what it has over an SBR chambered in 556 or 68. Is it just a novelty? To me each tool has to have a purpose. In a self defense situation, if what I have available is a pistol in 9mm or 45 that's what I will use but if I have a choice at the moment I will grab a rifle that has a lot of energy behind it (5.56,6.8 etc.) before I would grab a pistol caliber rifle. I fail to see any advantages it would have in any scenario like conceal ability etc.,etc. Except for a slight weight loss compared to my SBR's I fail to see any advantages. Maybe some of you guys that own these could explain to me what lured you in...