For some reason I'm not really compelled to put an AR stock on there. I have hoping RA releases a nice SCAR stock soon.
If they cancel that plan, or if they do release something but it isn't good, I might have some interest in adding a CTR with a cheek riser. But I want to get more info about if/when RA might release a dedicated stock first.
I did find an M93 just before the UBR "beta" started up. Problem was the owner was asking $250 for it and I wasn't about to pay that for a used stock that has been discontinued.
The UBR has the same functionality, though it seems a tad bulkier. The UBR is also somewhat simpler to set up and operate. However, if I ran across an M93 for, say, around $100 to $150 and it was LNIB, I'd probably pick it up.