A lot of Greg's sheath (I will have to take some photos), especially "Canteen-snapped" and riveted ones will be stamped with an "M". This denotes one of Greg's "Military" models. Most I have had made came with more of a natural tan leather, rather than the darker tan. Greg has made me waxed ones as well however. Hope this helps. Best, Capt. Chris
Yes it is an M also the leather is a light tan, the pics are kinda crappy, I just had to show it off!