This Remington manufactured 28" vent rib barrel with a fixed modified choke and a bright, near excellent bore is for the model 870 Wingmaster slide action shotgun in 12 gauge with a 2 3/4" chamber. The metal surfaces retain most of their original blue finish with light wear and a few faint specks of surface rust.  (file photos)

Note: Remington model 870 Wingmaster slide action shotguns with the following serial numbers have been found with this part:

12 Gauge 2 3/4": S051509V & T924532V