Mossberg 590 12 Gauge Pump-Action, 18.5 in Barrel, 5+1 Capacity, Magpul SGA Stock & MOE Forend (FDE) with Receiver-Top Picatinny Rail
This Mossberg 590 is a customized 12 gauge pump-action configured for compact handling and straightforward function. It features an 18.5-inch cylinder-bore barrel, a fixed 5+1 tubular magazine with an open-ended clean-out design, and a receiver-top Picatinny rail already installed. The Magpul SGA fixed stock with a 12-inch length of pull and matching Magpul MOE forend in FDE give it a short, consistent fit and durable polymer furniture.
Condition
Overall Condition: Fair condition, showing extensive signs of prior use and handling.
Bore Condition: Fair - Generally clean, some residue or smudges, slight corrosion.
Bore Fouling: Severe Fouling - Extensive corrosion, pitting, or erosion.
Specific Condition Notes: The exterior shows extensive scuffs, scratches, and handling wear. The front bead sight is chipped in half.
What’s Included
- Mossberg factory polymer birdshead grip (not installed)
- Mossberg OEM forend with hand strap (not installed)
- Magpul SGA fixed stock, FDE (installed)
- Magpul MOE forend, FDE (installed)
- Receiver-top Picatinny rail section, FDE (installed)
- Hook-and-loop backed nylon shotshell card panels, tan
- Adhesive hook-and-loop receiver panel for shell cards (installed)
Built on the proven 590 pattern, this shotgun uses a fixed tubular magazine (5+1) with an open-ended clean-out tube, forward lug, and knurled cap. It retains dual action bars and dual extractors for consistent cycling, and the aluminum alloy receiver wears a matte black finish.
The 18.5-inch steel barrel is cylinder bore with a fixed choke, providing a simple, no-adjustment setup. It is chambered for both 2 3/4-inch and 3-inch 12 gauge shells.
Ergonomics are tailored by the installed Magpul SGA fixed stock in FDE with a 12-inch length of pull and recoil pad, paired with a matching Magpul MOE polymer forend in FDE for a uniform, durable grip set.
The receiver is drilled and tapped with a receiver-top Picatinny rail section installed, and an adhesive hook-and-loop panel on the receiver interfaces with the included shotshell card panels. Controls include Mossberg’s ambidextrous top-tang safety. Sighting is via a bead front (brass) with no rear sight installed.




