Model 870 Express Field and Home Defense Combo 12 Gauge 3 Inch Chamber 28 Inch Field Barrel and 18.5 Inch Home Defense Barrel Black Oxide Metal Finish Dark Brown Hardwood Stock 4 Round. Features a twenty-eight inch vent rib field barrel with three chokes (Improved Cylinder, Modified and Full), plus a second Cylinder choke 18.5 inch barrel for use with home defense loads. Black oxide metal finish; black matte trigger. Dark brown hardwood stock and forend. Three inch chamber.