The ProMag Industries 7 Round Shell Holder Black, part of the Archangel line, provides a clean, low-profile way to keep extra 12 gauge shells right on your Mossberg 500 or 590 shotgun. The precision-molded carbon fiber–filled polymer shell carrier pairs with an anodized aluminum mounting plate to hold seven rounds securely along the receiver for quick access when topping off the magazine tube.

This side-saddle shell holder is designed specifically for Mossberg 500 and 590 12 gauge models equipped with military-length forends, ensuring it does not interfere with pump operation. An integrated, patent-pending retention adjustment system lets you fine-tune the tension on each individual shell to match your preferred ammunition and carry style, while a rubber molded gasket protects your shotgun’s finish. It is a practical upgrade for range training, home protection setups, or competition use, backed by ProMag’s reputation for thoughtful, purpose-built accessories.

Key Features:

• Manufacturer: ProMag
• Model: Archangel 7 Round Shell Holder AA113
• Caliber or Gauge: 12 Gauge
• Shell Count: 7
• Material: Carbon Fiber Filled Polymer Shell Carrier With Anodized Aluminum Mounting Plate
• Model Fit: Mossberg 500 / 590 12 Gauge Shotguns
• Mount Type: Side-Mounted Plate With Included Hardware
• Special Features: Individual Shell Tension/Retention Adjustment System, Rubber Gasket To Protect Receiver Finish