Awesome rifle Boogieman! I'm even more envious that you have a pic of your Great grand Dad.
I had a great Uncle who was in France in WWI. I just bought a beautiful "Eddystone" and bayonet that I like to think was his.
He died in 1964 when I was only 9. My great aunt gave me some medals and ribbons and his shaving kit that was Army issued to remember him by. Also, his 26th YD (Yankee Division) patch. You don't give that stuff to a 9 year old kid! Didn't she know I would lose it all in the woods while I was saving the world from the Nazis? I would give anything to have that stuff now.