Factory, stainless, cut at 20” and threaded 9/16-24. Weaver base and rings, rear site holes are plugged. Has a rub on the bead blast here and there. I purchased new at retail at Sportsman’s Warehouse way back when. I think they use a 12 twist. It stabilizes the 69gr hpbt’s at sea level. Decent shooter on my factory frame. No frame included. $300 shipped