Let me pick your brain on this then. You'd prefer an SBR/pistol in 5.56 than any 9mm/5.7/et al PCC? Even at shorter barrels, I think 5.56 has more muzzle energy than any of the subgun calibers, but aren't you concerned about the concussion of the blast or reduced accuracy?Probably mainly for those who want an MP7 but can't afford it. I don't see the draw to this or the 5.7 or frankly 9mm subguns.... I just don't see the splits being that reduced over 5.56 with subpar ballistics.