Alex Robinson sent me an email saying that the Robinson Arms XCR 6.5mm (I assume it is the 6.5mm Grendel) caliber conversion kit will be shipping in the second week of February and the 7.62×39mm kit near the end of February.

Robinson Armament XCR
Robinson arms recently caused some controversy over their support of Mitt Romney.
DEMIGOD has written a comparison of the 6.5mm rounds: the .260 Remington vs. 6.5×47 Lapua vs. 6.5 Creedmoor.
It’s been a good year for 6.5 mm. The .260 Remington has hit full stride after a ramp-up of several years, with top competitors at most field-style long-range matches shooting it. Lapua’s 6.5×47 saw the first wave of custom LR rifles built around it in 2007 and proved to be just as good as people hoped. Finally, Hornady is announcing its new 6.5 Creedmoor cartridge at SHOT 2008. How do these three mid-size 6.5 mm cartridges stack up against one another? I spent much of 2007 figuring out the answer to that question.

6.5mm Creedmoor
More here.