By now, just about everyone and their mother should be aware that Bushmaster Firearms (now wholly owned by seemingly unstoppable and more-than-a-little-ominous, voracious and rapacious gun-company-gobbling juggernaut Cerberus Capital Management, L.P.) will be manufacturing the multi-caliber MagPul Masada assault rifle/carbine under the name "Adaptive Combat Rifle", or "ACR" for short. But another MagPul item has been getting a good bit of press since the show, as well, and that's the slick little MagPul FMG9 (or, FMG-9) prototype folding 9mm Parabellum (9x19mm NATO ) mini / micro-submachine gun (SMG) that utilizes a Glock 17 slide and any factory Glock 9mm magazine,...