Looking at:

Fulton Armory Titan
Armalite AR-10 SASS
Larue OBR

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reliability, weight, and accuracy all point to OBR.

No experience with the other 2 but I love my FA Titan. I'm positive the OBRs are excellent weapons as well though.

Stole the photo from the previous owner. Haven't got around to taking photos of my own.

Kinda depends on the purpose. I think the OBR wears the med-long range precision crown hands down.

As a pure battle rifle, there are other possibilities. Not that the OBR is bad by any means, but I personally didn't want or need the 20MOA (or whatever it is) built into the rail of my short-med range 16" 308. LT actually recommends against collapsable stocks because of this. Doesn't make for a good cheek weld.

Pretty sure that's exactly why they are releasing the RISR - because they saw the immediate need with their own OBRs.