https://www.thegunparlor.com/products/mossberg-015813516020-015813516020-3873 

MANUFACTURER: Mossberg
FAMILY: 590 Series
MODEL: 590S Tactical
TYPE: Shotgun
ACTION: Pump Action
GAUGE: 12 Gauge
FINISH: Matte Blue
FINISH TYPE: Blued
STOCK: Synthetic Stock
STOCK/GRIPS: Black Synthetic
BARREL: 20"
OVERALL LENGTH: 41"
CAPACITY: 13 + 1
Listed Capacity Based On Manufacturer Specifications
SIGHTS: Ghost Ring
SIGHT TYPE: Adjustable Sights
WEIGHT: 7.25 lbs.
CHAMBER: 3"
CHOKE: Cylinder Bore
ADDL INFO: Short Shell Compatible
ADDL INFO: M-LOK Forend
MFG MODEL NO: 51602
UPC: 015813516020