Mossberg 590S Magpul HS407K 12 Gauge 18.5″

The Mossberg 590S Magpul with a Holosun HS407K is a 12 Gauge pump-action shotgun outfitted for practical security use. It ships with an 18.5-inch barrel and Magpul SGA adjustable stock paired with a MOE forend for familiar ergonomics and manual operation. The platform is documented to cycle 1.75″, 2.75″ and 3″ shells interchangeably, accommodating a range of shotshell lengths without adapters. A Holosun HS407K micro red dot is installed on the optic-ready receiver for rapid sight acquisition.

Key Specifications

• The gauge is 12 Gauge.
• The action type is Pump Action.
• The barrel measures 18.5 inches.
• The chamber accepts 3″ shells and cycles 1.75″, 2.75″ and 3″ lengths.
• The finish on metal is listed as Matte.
• The stock is Gray Magpul SGA adjustable synthetic.
• The forend is a Magpul MOE style forend.
• An Holosun HS407K micro red dot is installed.
• The overall length is 38 inches.
• The weight is approximately 6.75 lbs.

Built to deliver reliable manual operation and versatile ammunition compatibility, this configuration of the 590S places practical features where they matter: adjustable LOP, short-shell cycling, rugged Magpul furniture, and a factory-installed micro red dot for fast target acquisition. Its combination of familiar pump-action mechanics and modern furniture makes it a pragmatic choice for shooters who value dependable handling and straightforward functionality.