ORIGINAL: Viking_hunter
Does Green Mountain make a replacement barrel for T/C Whitemountain carbines? Also, do they make a fast twist barrel for shooting conicals that will fit the Lyman Great Plains Rifle?
The GM IBS barrels for the T/Cs will fit the GPR with the addition of another barrel lug. If you aren't comfortable doing this yourself, and it isn't that difficult, then any gunsmith can do it for you. TOTW will sell you the barrel and add the lug for a small additional charge.