Ah, the "Freedom Group". Let's see, Bushmaster can't deliver and Remington (parent company) really wants nothing to do with it. It really wasn't their idea so it has no merit? In any case, no rifles, uppers, or component parts.
Too bad. This SAAMI cartridge would make a nice AR thumper. Straight wall high pressure case, reasonable bolt face dimensions, and excellent loading/reloading possibilities certainly works for me.
It looks like Black Hole Weaponry may be one of the last hopes. A short polygonal rifled tube would be sweet.
I haven't seen or heard any updates on availability.