Dug out the old, beat to crap Albanian I have, and started looking over the carvings in it again. Never could quite figure anything out - thought it might be a guy's name, girlfriend's name, etc. Well, got a paper and pen, and started writing what I though I could make out, between the nicks, dings scratches, and cracks. Lo and behold, I plugged "PETRANPERMET" into google, and up popped "Petran, Albania"! Seems "Permet" is a municipality in southern Albania, and "Petran" was a village that became a subdivision of "Permet". Now I know where my rifle came from. Now, for the possible name "Stefnn", and possibly "Admango"?
These things can be fascinating. If only they could talk.