Mossberg 590S Magpul 12GA 18.5in Optic w/ Holosun HS407K

The Mossberg 590S Magpul is a 12 Gauge pump-action shotgun with an 18.5-inch barrel and an optic-ready receiver fitted with a Holosun HS407K micro dot. It is short-shell compatible and designed around proven Mossberg pump-action features including dual extractors and twin action bars. The firearm ships with Magpul SGA adjustable stock and MOE forend in grey and a matte blue metal finish.

Key Specifications

• This firearm uses a Pump Action operation for manual cycling.
• The gauge is 12 Gauge.
• The barrel measures 18.5 inches.
• The chamber supports a 3-inch maximum shell length and cycles 1.75", 2.75" or 3" shells interchangeably.
• An optic-ready receiver ships with a mounted Holosun HS407K micro dot.
• The stock is a Magpul SGA adjustable design with spacers for length of pull adjustment.
• The forend is a Magpul MOE synthetic unit in grey.
• Sights include a bead plus the installed micro dot optic.
• The overall length measures approximately 38 inches.
• The listed weight is approximately 6.75 lbs.

Built around Mossberg's long-standing pump-action platform, the 590S Magpul with Holosun HS407K offers adaptable shell compatibility and user-configurable ergonomics for security and utility roles. The combination of Magpul furniture, an optic-ready receiver, and proven mechanical features makes this model a practical option for shooters who prefer straightforward, dependable equipment with modern accessory integration.