Re: Teaching an old dog new tricks
I dunno if Green Mountain makes a drop in for a CVA but a CVA .54 will fit if it's the same width across the flats. CVA made a Mountain rifle with a 33 inch barrel, two wedge keys and an inch across the flats. It was also a round ball barrel only. The rest have a 29(I think)inch barrel that's 15/16 across the flats with one barrel key. The thing about CVA rifles is they have a drum breech where all the rest of modern makers used a snail breech. The rifle is practically the same thing as the TC and Investarmes Hawken which will interchange barrels but not with CVA because of the breech.