The Model 3000 was sold here by S&W, and after they dropped it, Mossberg sold it for a year of so.
The gun was actually made by Howa of Japan, who I think sold it under their name for a year or so too.
It was a top quality near-copy of the Remington 870, but parts don't interchange, and accessories like magazine extensions don't interchange.
As I recall, it was available in both steel and aluminum receivers.
For a time the S&W version 3000 had a sort of cult following among individual police.
At the time S&W was making a play for the entire police market. They had lines of holsters, ammo, and other police equipment and figured to take away Remington's 95% of the police pump shotgun market share.
Remington ate S&W's lunch, and shortly S&W announced they were dropping shotguns and getting back to their core market, pistols.
Most 3000 owners are very happy with the gun.
It's only problem was that it just didn't have anything to really offer over the well-proven Remington 870.