This is a 12 gauge barrel that is choked full and improve modified. Type 4 with a 11x7 rib In my opinion, a great barrel for hunting in the field, or for sub gauge sporting course or sub gauge. skeet A versatile way to expand your existing perazzi ! I wanted to keep these barrels and use them for sub gauge for Skeet, but I have decided to go another route This is a 28 and 3/8 inch barrel That comes with Briley fitted tubes I have all three gauges 20 28 and 410. all the tubes come with removable choke tubes included is the knockout tool. and the all-in-one choke tube wrench The fitted tubes alone are $2100 3k Dleivered is a steal… so this price is FIRM .