Md Dept 0f Corrections tried the 3000 in the early 80s, briefly. It was supposed to replace some superannuated Model 12s and it was cheaper than the the 870. Cheaper in a lot of ways.
The carrier was supposed to be jam proof, a superior design to the old 870s that could, if a shell was not loaded far enough to catch the detent, back out of the magazine and jam up the weapon, requiring either dissassembly or a clearing technique that was rough on the weapon.
Correctional shotguns, especially tower shotguns, have to handle large amounts of abuse,occasional and lacckadaisical cleaning, and use in all kinds of weather. The 3000 S&W just didn't hold up. Worked fine clean, but not after firing a box or two of shells.
If you keep it clean,use regular loads, not short mags, and treat it as any firearms should be treated, it should work OK for light duty.I doubt I'd use one for A-S scenarios if there were other shotguns available.