How do you remove the barrel on a Rem 7600
I was wondering how you take the barrel off a Rem 7600? I took the forarm off and trigger mechanism out of the rifle and now can't figure how the barrel comes off. Hear guys on another forum, that take them off. Looks like the slide tube has to be unscrewed from the bolt, how is this done? As the bolt has no hex or slot for a screw driver or a wrench. I see 4 holes in the tube, is this for some special wrench that unscrews the tube? Zeak