Appears to be early 95 model. I agree with sale2me about the bolt.
Most of the bolts I've seen on early model evos had knurled ends that matched the cocking rod knurking.
That looks like an sto bolt, but I could be wrong. Ram would have been a Wgp brass ram.
It was probably run on co2, so you'll need to add an hpr if you plan on running hpa instead.