The UBR is still proto-typed just like the Masada. The best line I have on when my Masada will be available is June and that's with orders not being taken by MagPul or their disties' until January. I know from a thread in the Colorado forum at ARFCOM that the MagPul guys just took back the Proto-type Masada they had over at Jensen's for more mods and testing.
Will be interesting to see one when they finally come out. Looks like a cross between the CTR and the M93b. Don't know if I'd get one as I'm very happy with my CTR's (one mil, one commercial) and my M93b
I also have a couple of VLTOR carbine modstocks, but that's another thread