Mossberg 590RM 12 Gauge Shotgun 18.5" Barrel 10+1 Capacity

The Mossberg 590RM delivers rapid-fire capability with its magazine-fed design, eliminating the traditional tubular magazine limitations found in standard pump-action shotguns. This 12-gauge platform accepts detachable box magazines for faster reloads and increased tactical flexibility.

What Makes This Different

Unlike conventional pump-action shotguns that require individual shell loading, the 590RM uses detachable magazines for quick capacity changes. The dual-extractors handle both 2¾" and 3" shells reliably, while the enlarged loading port accommodates various magazine configurations. This magazine-fed system reduces reload time from 30+ seconds to under 5 seconds with practiced technique.

Key Features

• Detachable box magazine system with 5, 10, 15, and 20-round magazine compatibility
• 18.5-inch barrel with cylinder bore choke for close-quarters effectiveness
• Dual extractors engineered for reliable feeding of 2¾" and 3" shells
• M-LOK forend with multiple attachment points for accessories
• Adjustable ghost ring sights with windage and elevation controls
• Heavy-walled barrel rated for high-brass magnum loads
• Ambidextrous safety located behind the trigger guard

The 590RM functions in adverse conditions where traditional tubular magazines might bind or jam. Law enforcement agencies report consistent cycling through sand, mud, and water exposure during field testing. The magazine-fed design maintains full functionality in prone positions where gravity-fed systems sometimes struggle. Competition shooters achieve stage times 40% faster compared to tube-fed alternatives in multi-target scenarios.

Technical Specs

• Gauge: 12-gauge, 3" chamber
• Barrel Length: 18.5 inches with cylinder bore
• Overall Length: 38.5 inches
• Weight: 7.25 pounds (empty)
• Capacity: 10+1 with included magazine
• Stock: Synthetic with textured grip surfaces
• Finish: Matte blue barrel and receiver
• Sights: Adjustable ghost ring rear, winged front post
• Safety: Cross-bolt, reversible for left-handed shooters
• Country of Origin: United States

The 590RM addresses the capacity and reload speed limitations that have defined pump-action shotguns for decades. Professional users gain tactical advantages previously available only in semi-automatic platforms, while maintaining the proven reliability of Mossberg's 590 series action.