Carlson's replacement shotgun barrels are manufactured of certified ordinance grade 4140 steel and feature chrome lined bores. This vent ribbed barrel has a satin matte blue finish and a red fluorescent front sight. The barrel ships with a Modified choke tube, constructed of 17-4 stainless steel. Notes: Barrel will fit magnum 3" and 2-3/4" receiver. Use only 2-3/4" shells when barrel is mounted to 2-3/4" receiver.