Citadel FRMN1220NKL Mariner 12 Gauge Pump Shotgun 18.5" Nickel

The Citadel FRMN1220NKL Mariner delivers corrosion-resistant performance in harsh environments where standard shotguns fail. This marine-grade pump-action combines nickel-plated durability with tactical functionality for professional and sporting applications. The full heat shield barrel and stainless steel receiver provide extended service life in coastal and humid conditions.

What Makes This Different

The Mariner's comprehensive nickel plating system extends beyond typical surface treatments to include the barrel, receiver, and Picatinny rail. While standard shotguns show corrosion within months of saltwater exposure, the Mariner's electroless nickel finish resists pitting and maintains function after 500+ hours of salt spray testing. The full-length heat shield protects the barrel during rapid-fire sequences and prevents burns during tactical reloads.

Key Features

• Electroless nickel-plated barrel, receiver, and rail system for maximum corrosion resistance
• 18.5-inch cylinder bore barrel with full-length ventilated heat shield
• 4+1 capacity with 3-inch chamber capability for versatile ammunition options
• Top-mounted Picatinny rail accepts optics, lights, and tactical accessories
• Fixed walnut stock provides traditional aesthetics with modern functionality
• Stainless steel receiver construction eliminates rust concerns in marine environments
• Standard 12-gauge platform accepts all common shell lengths and types

Field testing demonstrates reliable cycling with loads from 2.75-inch target shells to 3-inch magnum hunting rounds. The cylinder bore handles buckshot patterns effectively at defensive distances while maintaining acceptable accuracy with slugs to 75 yards. Law enforcement agencies operating in coastal regions report consistent function after extended exposure to salt air and moisture. The heat shield allows sustained firing without barrel contact burns during training exercises.

Technical Specs

• Gauge: 12 gauge, 3-inch chamber
• Barrel Length: 18.5 inches, cylinder bore
• Overall Length: 38.5 inches
• Weight: 7.2 pounds
• Capacity: 4+1 rounds
• Stock: Fixed walnut with traditional dimensions
• Finish: Electroless nickel on all metal surfaces
• Receiver: Stainless steel construction
• Rail: Nickel-plated Picatinny rail, 6-inch length
• Action: Pump-action with dual action bars

Professional operators choose the Mariner when equipment failure means mission compromise. The nickel plating adds minimal weight while providing protection that extends service intervals and reduces maintenance requirements in demanding environments.