rifled barrel. I bought one a few years back for my 870 from rem with a rem scope already on it for $250 I think from Cabellas.. I am 4'' group at 150yds, or was when I first got it. I havn't shot it since. Don't try and be cute and shoot 3'' slugs out of it either unless you have a couple hundred lbs of extra fat...it hurts I did it twice.