I'd contact T/C to make sure, but I think ANY contender barrel will mate up to a Contender frame, including the G2. But, if its a very early frame, it'll snap right on, but will NOT break down.(coming from a personal experience) I bought a very early frame with two octogan barrels and took it home and put on a newer barrel. Everything hooked up, but when I tried to break it down, it was locked up, wouldn't budge!! I litterally had to take it down to almost nothing before getting it to open. Sounds like you have a newer frame, so that won't matter, but just an FYI for anyone with a very old frame. Live and learn.