Carlson's high quality accessory shotgun barrels are made for Remington 870 models and Benelli SuperNova and Nova models. All barrels are constructed from certified ordinance grade 4140 steel with chrome lined bores. Vent rib models have a satin matte blue finish with red flourescent front sight and brass center bead. Each barrel comes with a Carlson Modified choke tube, manufactured from 17-4 stainless steel. All of our Remington replacement barrels are threaded for the Remington 870 standard Rem Choke system and Benelli barrels are threaded for the Benelli Mobil choke style system. Enhance the versatility and performance of your shotgun with a Carlson's repla Mfg: Carlsons SPECS: 4140 steel with chrome lined bores. Satin matte blue finish with red flourescent front sight and brass center bead.Threaded for Rem Choke or Ber/Ben choke.