I've been thinking about one of these for my SBR for a long time now.  I'm considering the weaver mount or the flat top mount.

Will either of these co-witness?  The optic looks really tall

I run a RX30-23 with the ARMS #15 Throw Mount and it co-witnesses perfectly, the dot sitting right on top of the front sight.  Not sure about the mounts you listed, so I can't answer your questions unfortunately.  Very nice optic though.

I have both the RX30 & RX34 and with my mounts they will not co-witness at 1/3, maybe 1/10 at best.   I have not tried the RX11 Weaver mount, it appears it may work, but I'm not sure how tight it would be on a 1913 rail and it's not QR which could kill it for me.  

There is a low profile mount, the RX15 (RX16 for weaver) that I may look into, but a spacer will be needed at an additional $25, but it sits lower than what I have now so I may give it a try.  

Here are the mount heights:
RX11 (Weaver): .295"
RX15/16: .440": (.315" & spacer .125")
RX23 (ARMS 15): .516" (.381 + spacer .135)
RX15: .640"
TA-51: ? but appears to be the same as the RX23 w/ Spacer

Here's how mine look on a rail, note how high they are in relation to the BUIS which are standard Troy.  The first is the RX34 in an ARMS mount and the second is a RX30A-51 with the TA-51mount.  The last mount is a RX14 which it too tall as you can see.

Hope this helps & please keep us informed if you try the RX11 mount an a RX34, even w/o the QR, that may be the way to go.

Thanks for the info.  I search the interwebs high and low for a pic like that