Answering Mr. Wolverine's question:
I am definitely interested in one of these toys. But cannot tell for sure which one I want first (yet).
APC9 feels a bit more extraordinary. But I might consider a non-restricted APC223 if it arrives earlier.
I did some estimates and can tell, that I cannot justify APC300 - .300 BLK ammo is still too expensive.
It would be approachable if APC platform allowed quick barrel/caliber change, but it looks like it doesn't
(actually, it would be great to clarify this).
In order to make a qualified decision, it would be great to know a bit more details:
1. Weight of the non-restricted APC 223 version.
2. It's accuracy.
3. Does it come with longer or shorter handguard?
4. Are iron sights included in the price?
By the way, does it come with the native B&T forward grip (like APC9 above), or the IMI one (shown in the earlier APC 223 photos)?
I suspect many people would prefer the native B&T grip for stylistic consistency.