173rdAbn:  By 'separation', I am assuming your forestock separated from the rest of the stock at the barrel band, due to a hidden cut.  I would try using a short length of 1/4 inch threaded rod (cut off from a steel or brass machine screw or bolt).  I would drill holes, that line up, into the ends of the separated forearm and main stock.  Once I was sure everything lines up and can slide back together, I would put epoxy glue on the threaded rod and mating wood surfaces, and slide everything back together.  I would take the precaution of putting a film of vaseline on the barrel where it might contact the glue joint.  I would use some masking or duct tape as a temporary "barrel band", while the epoxy is setting.  Once the epoxy has hardened, clean off the vaseline, tape, and excess epoxy.  Put everything back together and you should be good to go.