Remington 870 SuperMag barrel?

[Quigley]

I have an option to get an 870 Super Mag in a trade but I am wondering if they make 18.5" barrels for these guns and if not what is the shortest barrel that they make for these. I at least want a barrel that will work for the Super Mag that shoots 3" rounds.

[aippi]

they do not make a short barrel chambered for 3.5" for the Supermag, however, you can use any 18.5" 870 12ga barrel but will be limited to shooting up to 3" from it.