In case anyone is wondering, got the below response from Double-Alpha today . . .
hope this finds you well and thank you for the interest in our 550 case-feeder.
Unfortunately, we had an issue with the 223 casing, which push back our release date until the 1st quarter of 2020.
Sorry for any inconvenience this may have caused.
I dont care, I only use pistol ammo anyway. Oh well. Wait some more.