Mossberg 590 12 Gauge Pump-Action, 18.5 in Cylinder Bore, 5+1 Capacity, Magpul SGA Stock, SureFire DSF-500/590 Forend Light
This Mossberg 590 is a 12-gauge pump-action configured for practical use with purposeful upgrades. It features an 18.5 in steel barrel with a fixed cylinder bore, a standard 5+1 capacity magazine tube, and a brass bead front sight. Notably, it is outfitted with a Magpul SGA polymer stock set to approximately a 12.5 in length of pull and a SureFire DSF-500/590 dedicated forend weapon light for Mossberg 500/590, LED powered by two CR123A batteries.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: There are markings from previous handling and use. The bore is bright and clean. Please refer to the photos for a closer look at the surfaces and markings.
What’s Included
- Forend Light: SureFire DSF-500/590 dedicated forend weaponlight for Mossberg 500/590 (installed)
- Stock: Magpul SGA stock for Mossberg 500/590 (installed)
The 18.5 in barrel is marked for both 2 3/4 in and 3 in shells and uses a fixed cylinder bore, making it straightforward and consistent with a brass bead front sight. The steel barrel and matte black finish pair with an aluminum alloy receiver, also matte black, for a durable, uniform setup.
Ergonomics are enhanced by the Magpul SGA polymer stock in black, configured to approximately a 12.5 in length of pull. The stock includes sling slots and a fixed design to provide a solid, repeatable mount.
Lighting is fully integrated via the SureFire DSF-500/590 dedicated forend weapon light for Mossberg 500/590. This LED unit is powered by two CR123A batteries and replaces the standard forend, giving an all-in-one handguard and illumination solution.
This 590 uses a standard-length 5-round magazine tube (5+1 overall capacity) with a 590-pattern magazine cap and guide ring that enable easy magazine clean-out. It features right-side ejection with twin action bars for solid cycling.
Configuration details include a plain barrel profile without a heat shield, ghost-ring sights, rail, or bayonet lug. The receiver is marked North Haven, Connecticut, U.S.A., and the firearm is made in the United States.




