Mossberg 500A 12 Gauge Pump-Action, 20 in Cylinder Bore Barrel, Brass Bead Sight, Black Finish, Pistol-Grip, 5+1
This Mossberg 500A is a 12 gauge pump-action configured with a 20-inch fixed Cylinder Bore barrel and a brass bead front sight. It is chambered for both 2.75 and 3 inch shells and features the 500-series action with dual action bars, twin extractors, and an anti-jam elevator. The anodized aluminum-alloy receiver is drilled and tapped with filler screws installed, and the ambidextrous top-tang safety provides intuitive control. Included sling and swivels are already installed.
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: Scratches and handling wear are present on exterior surfaces, with small areas of minor surface rust. The bore presents bright and clean.
What’s Included
- Sling: Black nylon web sling
- Sling Swivels: Uncle Mike's quick-detach rear swivel and front sling swivel mounted to the forward barrel/magazine lug beneath the barrel (installed)
The 20-inch barrel is marked "Chambered for 2¾ and 3 in. shells — 12 Ga – 20 in. — Cylinder Bore," providing a straightforward, versatile setup with a plain, fixed Cylinder Bore. A single brass bead serves as the front sight, with no rear sight, keeping the sight picture fast and uncluttered.
The receiver is anodized aluminum alloy and is drilled and tapped with filler screws installed. It has right-side ejection and a bottom loading port. The top-tang safety with a red index dot allows ambidextrous operation and easy visual confirmation.
Typical of the 500-series, this shotgun uses dual action bars, twin extractors, and an anti-jam elevator. The steel barrel wears a blued/black oxide finish, and the extended-length tubular magazine runs to the muzzle with a knurled end-cap. Capacity is 5+1.
Furniture includes a black synthetic pistol-grip-only stock and a ribbed synthetic fore-end for positive purchase. Sling mounting is in place with Uncle Mike's quick-detach rear swivel and a front swivel mounted to the forward barrel/magazine lug beneath the barrel, and a black nylon sling is included.
Receiver markings read "Mossberg — Made in U.S.A. — North Haven, Conn. — 500A 12 Ga." This U.S.-made example adheres to the established 500A pattern and features the durable materials and controls associated with the platform.