I wouldn't change out any of the parts on your Govt. Carbine. These are quite collectible now. I have a GC model I bought in early 1994, #GC0099XX which I paid $1100.00 for. I bought it totally as an investment and it is still new in the box (Blue Label). Another dealer I know has offered me $2400.00 for it, but I think I'll hang onto it for a while.