FWIW...Another thing to consider, according to Dennis at Empire Arms, once you remove the grenade launcher it nullifies the C&R status of the rifle.
At least that's what he told me when he had one come up for sale that was mfg. in 1970 and I asked him if he could just remove the grenade launcher before shipping it to me. It was a no-go for him. Too bad, the one he had was super clean and had all the cool accessories. Rats!!!
I want one of these in a bad way, too glensche!