The Mossberg 590M 20-round 12 Gauge shotgun magazine is a double-stack magazine designed to improve swing balance and control compared to longer single-stack alternatives. Built with hardened steel feed lips and shell ramps paired with a self-lubricating polymer magazine body, it’s engineered for reliable feeding and easier maintenance with a removable floor plate.

Key features

• Double-stack 20-round capacity for 12 Gauge 2.75 in shotshells
• Hardened steel feed lips and over-molded steel shell ramps for durable feeding
• Self-lubricating polymer magazine body material helps support smooth operation
• Heavy-duty music wire spring tuned for magazine reliability
• Removable floor plate for easier cleaning and upkeep
• Black oxide finish on steel components for added corrosion resistance

Add extra capacity to your Mossberg 590M with this factory-style 20-round magazine.