Mossberg 590M 12 Gauge 20-Round Magazine

This is a factory 20-round magazine for Mossberg 590M and 590M Shockwave 12-gauge shotguns.
The world’s first production double-stack 12GA shotgun magazine offers a shorter magazine length vs. capacity than competitor’s single-stack designs, providing better swing, balance, and control. Magazine construction highlights: 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, and a tough black oxide finish on steel components. For use with 2.75” shotshells.