What do you want to do with it? Most bolts you see will be for slug hunting and have rifled barrels. Mossberg used to make a bolt action bird barrel with variable choke on it. I owned one years ago, but I couldn't tell you what model it was off hand. As a matter fact I wouldn't bet money it was a mossberg now that I think of it. May have been an older savage possibly?

I know I don't see many with bird barrels though.

TarHunt also makes them, but they are BIG bucks.

Paul