Mossberg 590M 12 GA 20-Round Magazine

590M™ Series accessory magazines pack more rounds into shorter magazines - quickly and efficiently adding capacity.

The world’s first production double-stack 12 GA shotgun magazine offers a shorter magazine length vs. capacity than competitor’s single-stack designs.

• Provides better swing, balance and control
• Hardened steel feed lips
• Over-molded steel shell ramps
• Easy-grip external molded design
• Proprietary self-lubricating polymer magazine body material
• Heavy-duty ASTM-A-228 music wire magazine spring
• Removable floor plate for easy cleaning
• Tough black oxide finish on steel components
• For use with 2.75" shotshells