Mossberg 590A1 Magpul 9-Shot 12 Gauge, 20 in Heavy-Walled Barrel, Ghost Ring Sights, TL-Racker Forend, 8+1
This Mossberg 590A1 Magpul 9-Shot combines the proven 590A1 action with a heavy-walled 20-inch cylinder-bore barrel, full-length magazine tube, and factory-style ghost ring sights. It is outfitted with a Streamlight TL-Racker integrated-light forend and an XS-marked rear sight mounted on a receiver-top Picatinny rail. The receiver is marked "M590A1," and the platform is documented as the only pump-action shotgun line to pass U.S. Mil-Spec 3443 testing.
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: This firearm is in solid shape. It shows various cosmetic imperfections, including scratches, scattered blemishes, and areas of finish loss.
What’s Included
- Forend: Streamlight TL-Racker integrated-light forend (installed)
- Forend: Magpul MOE forend for Mossberg 590/590A1 (loose, not installed)
- Rail: Receiver-top Picatinny rail (installed)
- Sights: XS ghost-ring rear sight mounted on receiver rail (installed)
- Sling Mount: Magazine-tube clamp with QD sling swivel socket (installed)
The 590A1 build centers on a heavy-walled 20-inch barrel with a true cylinder bore, chambered for both 2 3/4-inch and 3-inch 12-gauge shells. Its full-length magazine tube follows the nine-shot pattern, providing an 8+1 capacity with 2 3/4-inch shells. A bayonet lug is incorporated at the front.
Sighting is handled by a protected front post and an XS ghost-ring rear aperture mounted to the receiver-top Picatinny rail. This setup delivers a robust, service-style sighting system matched to the 590A1’s heavy-barrel configuration.
Ergonomics and controls include Mossberg’s tang safety and a polymer stock in gray with an adjustable spacer system and recoil pad. The installed Streamlight TL-Racker integrated-light forend provides an upgraded, single-piece forend with built-in illumination controls. A magazine-tube clamp with a QD sling swivel socket is installed for sling attachment.
The aluminum receiver wears an anodized black finish with a matte overall appearance. The receiver is marked "M590A1," and barrel rollmarks confirm 12 GA, 20-inch, cylinder bore, and 2 3/4-inch/3-inch chambers. The 590A1 line is documented as the only pump-action shotgun to pass U.S. Mil-Spec 3443 testing.