Well that's the earlier (and much rarer) Kirk Precision, a conversion of the road bike frame, rather than the later, notorious Revolution ATB.
I have one, and it's much like a stiff 26" wheeled 'cross bike. BB is a bit low for serious off-road and the tyre clearance is narrow, but it's not the allegedly fragile and flexy e-stay beast of legend.
A Campag groupset is still completely wasted on it, though