Maybe an 857, though they came with normal shocks, maybe an after-market or upgraded shock, what model is it? The 957 came with a shock with res, though it also came with carbon forks, are they metal legs? Unlikely someone downgraded the forks, though you never know.
Nice bikes, though not as plush or nice riding as the earlier rear mounted swingarm models, they still are a great light xc bike.