The 98 has the third, or safety lug, 96s don't, although there is a bolt guide that passes through the bidge. There is a pad on the 98 over the extractor relief that looks like it is added to the ring,, although it is integral, the 96s receiver rings look round. The gas escape hole in the 96's bolt is a small round hole, while on the 98 it is a large oval. The shroud is smaller and the cocking piece doesn't protrude as far when the rifle is cocked, it is baffelled interanlly to keep escaping gas from passing back to the shooter's face.