Bree:
According to my records S&W discontinued importing all Howa mfg'd shotguns in 1984. Mossberg continued importation utilizing leftover S&W parts in addition to fabricating their own.
In addition, this model is the same as the Model 3000, Mossberg or S&W. It is also indicated that there was a Slug version of the Model 1000, produced in 1986-1987.
This would indicate to me that the Mossberg is interchangable with the S&W. If at all possible, and you want to change the barrel, I would suggest trying to get the S&W barrel or Mossberg, depending which you have, to keep it as a unit and not a mixed parts gun.
HJN
[This message has been edited by Harley Nolden (edited September 28, 1999).]
