The old girl has more mixed parts on it that the car in John Cash's car song.
The forend, even though marked with the X has the holes and cuts for the grenade launching sight. Parts run the gamete.
Trigger guard is LB and rear sight is F. Just cleaning the gunk off the wood right now so should have it back together in a couple of days to a week. It's been sitting here for a coons age and time to get the grease cleaned off it and in the rack.
No doubt it was severely overhauled by the Indians and what a mixed bag.