It is hard to describe how to do this with just your hands. Has to do with how to grip the bolt, pull and rotate. The easiest way I found was to grab the notched bar inside the bolt with a good pair of vise grips and pull it back and rotate it into the rear notch. It can be done with a screwdriver as well but the last time I did that things got bloody.

This might help:
http://www.surplusrifle.com/romanian196 ... ble/hs.aspThe spring follower, if it is all the way forward, must be moved to the rear about 3.4 inch and rotated right into that notch shown in figure 2. It is best not to disassemble these bolts. They are the hardest to put back together that I have ever worked on.