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Yes, the Mossberg 590M Double Stack 12 Gauge 20 Round Shotgun Magazine fits exclusively with the Mossberg 590M (Shockwave) Mag Fed pump-action shotgun. It will not fit the standard 590 Shockwave that in not magazine fed.
Color: Black Fabric/Material: Polymer Magazine Capacity: 20 RoundGauge: 12 Gun Make: Mossberg Condition: Used Condition Quality: Fair Condition Details: Scratches
Code: MOS-SM-GHT286-95140-20RD-EDEMO1
MPN: 95140-EDEMO1
Product No Longer Available
Product Info for Mossberg 590M Double Stack 12 Gauge 20 Round Shotgun Magazine
2.75in shotshells only. Patented double-stack design, for use exclusively with the Mossberg 590M Mag Fed Shotgun. Features hardened steel feed lips, over-molded shell ramps, easy grip molded design, proprietary self-lubricating polymer magazine body material, removable floor plate for easy cleaning, and a tough black oxide finish on the steel components.