Mossberg FLEX 500: Adaptable 12 Gauge Pump Action Shotgun
The Mossberg FLEX 500 is a robust 12 gauge pump-action shotgun built on the highly regarded Mossberg 500 platform, delivering consistent performance and operational dependability. This model is engineered for adaptability, providing a reliable option for personal defense and diverse shooting applications. The included 18.5-inch barrel optimizes maneuverability in confined spaces, while the pistol grip configuration ensures a secure hold and precise control during dynamic engagements.
Chambered for 2 ¾ and 3-inch shotgun shells, the FLEX 500 accommodates a comprehensive range of loads, from birdshot to heavy defensive slugs. Its defining characteristic is the proprietary Mossberg FLEX System, which facilitates rapid, tool-less interchangeability of stocks, recoil pads, and forends. This integrated modularity allows the user to quickly reconfigure the shotgun for specific roles, expanding its utility significantly without requiring specialized tools or extensive downtime for modifications. This system ensures that the shotgun can seamlessly transition from a compact defensive setup to a more traditional sporting configuration as different firearm accessories are integrated.
The enduring design inherent to the Mossberg 500 series guarantees a high degree of operational reliability, making this shotgun a suitable choice for rigorous training at the shooting range or for critical home defense scenarios. The Mossberg FLEX 500 combines practical, utility-focused features with the proven reliability expected from its manufacturer.
Key Features
FLEX Modular System
- Enables rapid, tool-less interchangeability of critical components including stocks, recoil pads, and forends.
- Optimizes the shotgun’s configuration for diverse operational requirements and user preferences.
- Significantly enhances adaptability and versatility for various shooting disciplines and defensive roles.
Barrel and Handling
- 18.5-inch barrel length provides an optimal balance of pattern performance and close-quarters maneuverability.
- Pistol grip configuration enhances control and allows for a more compact storage footprint.
Ammunition Versatility
- Chambered for both 2 ¾ and 3-inch 12 gauge shotgun shells, supporting a broad spectrum of ammunition types.
- Facilitates integration of various loads for hunting, sport, and personal defense applications.
Operational Reliability
- Built upon the proven Mossberg 500 pump-action platform, recognized for its robust construction and dependable cycling.
- Engineered for consistent performance under demanding conditions.
Technical Specifications
- Model: Mossberg FLEX 500
- Gauge: 12 Gauge
- Action: Pump Action
- Chamber: 2 ¾ and 3-inch
- Barrel Length: 18.5 inches
- Finish: Matte Blued (standard)
- Stock/Grip: Pistol Grip (initial configuration, FLEX System compatible)
- Sights: Bead Sight (standard)
- SKU: TSW|80215









