Availability: In Stock
The Mossberg 590M 12 Gauge 20-Round Double Stack Magazine gives you serious capacity in a more compact footprint than traditional single-stack designs. If you run a 590M platform shotgun—whether for sport shooting, home defense, or tactical work—this magazine delivers the round count serious shooters demand without sacrificing the handling and balance you need when it matters. Twenty rounds in a double-stack configuration means less front-to-back length and better swing characteristics than you'd get with an equivalent single-stack setup.
Build quality is where Mossberg focuses. The magazine uses hardened steel feed lips over-molded onto steel shell ramps to reliably cycle 2.75" shotshells round after round. The body is proprietary self-lubricating polymer that resists wear and friction. A heavy-duty ASTM-A-228 music wire spring maintains consistent tension, while the removable floor plate makes field cleaning and maintenance straightforward. Steel components wear a tough black oxide finish that handles hard use.
If 20 rounds feels like overkill for your setup, Mossberg offers the same magazine in 5, 10, and 15-round capacities, so you can tailor load-out to your mission. Swap between them without tools, and you've got flexibility for everything from three-gun competition to patrol readiness.
| Caliber | 12 Gauge |
| Capacity | 20 Rounds |
| Stack Configuration | Double Stack |
| Shell Length | 2.75" |
| Magazine Body Material | Self-lubricating proprietary polymer |
| Feed Lips | Hardened steel over-molded onto steel shell ramps |
| Spring | ASTM-A-228 music wire |
| Floor Plate | Removable for cleaning |
| Finish | Black oxide (steel components) |
This magazine is engineered for the Mossberg 590M platform shotgun.
The 590M magazine is rated for 2.75" shotshells.
Yes. Mossberg offers the same magazine in 5, 10, and 15-round configurations if you prefer a lighter load-out.
The removable floor plate allows you to disassemble the magazine for easy cleaning and maintenance.
SKU: 115676535 • Width: 4.3in • Height: 2.8in • Depth: 13.1in • Weight: 1.94oz
Availability: In Stock
The Mossberg 590M 12 Gauge 20-Round Double Stack Magazine gives you serious capacity in a more compact footprint than traditional single-stack designs. If you run a 590M platform shotgun—whether for sport shooting, home defense, or tactical work—this magazine delivers the round count serious shooters demand without sacrificing the handling and balance you need when it matters. Twenty rounds in a double-stack configuration means less front-to-back length and better swing characteristics than you'd get with an equivalent single-stack setup.
Build quality is where Mossberg focuses. The magazine uses hardened steel feed lips over-molded onto steel shell ramps to reliably cycle 2.75" shotshells round after round. The body is proprietary self-lubricating polymer that resists wear and friction. A heavy-duty ASTM-A-228 music wire spring maintains consistent tension, while the removable floor plate makes field cleaning and maintenance straightforward. Steel components wear a tough black oxide finish that handles hard use.
If 20 rounds feels like overkill for your setup, Mossberg offers the same magazine in 5, 10, and 15-round capacities, so you can tailor load-out to your mission. Swap between them without tools, and you've got flexibility for everything from three-gun competition to patrol readiness.
| Caliber | 12 Gauge |
| Capacity | 20 Rounds |
| Stack Configuration | Double Stack |
| Shell Length | 2.75" |
| Magazine Body Material | Self-lubricating proprietary polymer |
| Feed Lips | Hardened steel over-molded onto steel shell ramps |
| Spring | ASTM-A-228 music wire |
| Floor Plate | Removable for cleaning |
| Finish | Black oxide (steel components) |
This magazine is engineered for the Mossberg 590M platform shotgun.
The 590M magazine is rated for 2.75" shotshells.
Yes. Mossberg offers the same magazine in 5, 10, and 15-round configurations if you prefer a lighter load-out.
The removable floor plate allows you to disassemble the magazine for easy cleaning and maintenance.
SKU: 115676535 • Width: 4.3in • Height: 2.8in • Depth: 13.1in • Weight: 1.94oz