Mossberg 500A 12 Gauge Pump-Action Shotgun, 18.5 in Cylinder-Bore, 4+1 Capacity, Blued Finish with Wood Furniture
This Mossberg 500A comes in the factory 18.5 inch security/defense configuration with a plain, cylinder-bore smoothbore barrel and a 4+1 tubular magazine. It is chambered for both 2 3/4 inch and 3 inch shells, features a blued finish over an aluminum receiver, and wears classic wood furniture. A tang-mounted sliding safety, right-side ejection, and Mossberg’s modular barrel system round out a straightforward, proven setup.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Specific Condition Notes: The firearm functions properly with a solid action. The exterior shows scattered scratches and blemishes from prior handling. The bore is clean and shiny.
What’s Included
- Mossberg 500A 12 Gauge pump-action shotgun
The 18.5 inch barrel is a plain, cylinder-bore smoothbore built from steel, optimized for wide-pattern performance without a vent rib. Its chamber accepts both 2 3/4 inch and 3 inch shells for flexibility with a range of 12 gauge loads. A brass bead front sight provides a simple, durable aiming reference.
The receiver is aluminum with a blued finish and right-side ejection. Mossberg’s tang-mounted sliding safety offers intuitive control from the top of the receiver. The action is the proven 500-series pump design with a tubular magazine feeding a 4+1 capacity.
Wood furniture includes a pistol-grip style stock with pressed checkering, a straight comb, and a vented rubber recoil pad. The matching wood forend complements the classic look while providing a secure grasp. Length of pull measures 14.0 inches.
Configured from the factory as a security/defense model, this 500A retains the platform’s modular barrel system that allows quick barrel swaps. The overall setup is straightforward and practical, built in the USA with the familiar Mossberg 500 series ergonomics.




