As I figured, production usually takes longer than they anticipate.
For the CTR stock, there will be two versions, the one that will fit Mil-Spec tubes (Colt, Vltor and a couple others) and those that fit non-mil-spec tubes (RRA, DPMS, and the rest). The non-mil-spec will fit mil-spec tubes, but be a little loose. The Mil-Spec will NOT fit non-mil-spec tubes, as the tubes are a few thousandths larger.
I have mostly the non-mil-spec version on order and hope to get them in a couple week.
The UBR stock is their replacement for the M93 stock. Therefore, the price of the M93 will drop somewhat (not a lot) as the UBR production increases to where dealers can get them. It's a nice stock, but I think I like the CTR better. And the CTR is much less expensive.