Panzer Arms M4 Marine | 12ga | 18.5in | Nickel | 5rd

The Panzer Arms M4 Marine is a 12 gauge semi-automatic shotgun built around an ARGO piston-driven system and finished with electroless nickel-phosphorus plating for enhanced corrosion resistance in maritime or wet-field environments. It pairs a compact 18.5-inch barrel with a standard butt stock and a 5-round magazine tube, and features ghost ring sights and a top rail for optics or accessories. Intended for use in salt-prone environments and for sporting applications, the M4 Marine balances corrosion protection with AR-style ergonomics.

Product Specifications

• The manufacturer is Panzer Arms.
• The model is listed as M4 Marine.
• The action is ARGO piston-driven semi-automatic.
• The gauge is 12 gauge.
• The barrel measures 18.5 inches.
• The capacity is 5 rounds.
• The finish is electroless nickel-phosphorus plating for enhanced corrosion resistance.
• The stock is a standard butt stock.
• The sighting system uses ghost ring sights.
• The firearm includes a top rail for optics or accessories.
• The magazine feature is an extended magazine tube with sling attachment points.
• The listing name references a 3 inch chamber and a 3-choke set in one variant string.
• The UPC is 869325000238.

The M4 Marine is specified to resist corrosive environments while providing the handling and accessory options familiar to AR-style shotgun users. Its 18.5-inch barrel and nickel-phosphorus finish make it a fit for water-prone sporting work and environments where corrosion resistance is valuable, while the ARGO piston system reduces direct gas fouling for consistent operation. With ghost ring sights and a top rail, it accepts both iron and optical sighting solutions for varied shooting tasks.

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