I'd say look for used scopes. I have a tasco golden antler on my .54 muzzleloader that works great. I just bought another one for 20 bucks. If it holds zero for my muzzy it should be fine for the m1.
I have been a silent witness
to all of America's finest hours.
But my finest hour comes
when I am torn into strips and used as bandages
for my wounded comrades on the battlefield,
When I fly at half-mast to honor my soldiers,
Or when I lie in the trembling arms
of a grieving mother
at the graveside of her fallen son.