Description
Picture this: a sudden noise downstairs in the middle of the night. You need a tool that’s ready, adaptable, and manageable for any member of your household. That’s where the Mossberg Flex 500 20 Ga, 20″ Barrel, FLEX 6-Position Adjustable Stock comes in. It’s a highly configurable, compact 20-gauge shotgun built on Mossberg’s proven 500-series action, designed for home defense and tactical applications where fit and control are non-negotiable. The core innovation is its FLEX system, allowing the stock to be swapped or adjusted for different users and scenarios without tools.
The heart of this platform is its modularity. The FLEX stock isn’t just adjustable for length of pull; it’s part of an ecosystem. You can swap it for a pistol grip, a different stock, or specialized components in seconds. This means one firearm can be precisely tailored for a smaller-statured user one moment and a larger one the next—no gunsmithing required. It’s a practical solution for a household where multiple people may need to be proficient with the primary defensive tool. The 20-gauge chambering is a key feature here. It delivers decisive stopping power with significantly less recoil than a 12-gauge, making follow-up shots faster and training less punishing, especially for newer shooters. With an overall length around 40.5″ and a weight of approximately 7 lbs, it’s maneuverable in tight hallways without sacrificing stability.
Key Features & Performance
The 20-inch barrel provides a balanced profile. It’s long enough for a clean swing and effective patterning with defensive buckshot or slug loads, yet short enough to remain highly maneuverable indoors. The cylinder-bore choke (typically standard on tactical barrels) ensures consistent pattern spread at close quarters. The dual extractors and twin action bars, hallmarks of the Mossberg 500 design, provide reliable cycling under stress. The safety is located on the tang, an intuitively accessible position for both right and left-handed users. The 6-position adjustable stock is the star, offering a length of pull range to fit virtually any adult frame securely. A secure fit is the foundation of control, and this shotgun delivers it out of the box.
Here’s the thing—versatility is its own form of preparedness. The FLEX system is compatible with a range of Mossberg FLEX accessories, allowing you to configure the shotgun for a specific role. Want a dedicated cruiser-ready setup? Swap to a pistol grip module. Planning a training class? Adjust the stock for optimal comfort. This adaptability extends the shotgun’s utility far beyond a single, static purpose. The pump-action mechanism itself is a study in simplicity and durability, a trait that has made the Mossberg 500 a trusted choice for military and law enforcement for decades. At $565.40, it represents a significant value for a system with this level of built-in customization.
| Specification | Detail |
|---|---|
| Gauge | 20 Gauge (3″ Chamber) |
| Barrel Length | 20 Inches |
| Overall Length | ~40.5 Inches (Stock Adjusted) |
| Weight | Approx. 7 lbs |
| Capacity | 5+1 Rounds (with plug removed) |
| Stock System | FLEX 6-Position Adjustable |
| Action | Pump Action |
| Choke | Cylinder Bore |
Pros & Cons
Pros: The adjustable FLEX stock provides a custom fit for virtually any user, enhancing control and reducing felt recoil. The 20-gauge chambering offers effective power with manageable recoil, ideal for home defense. Mossberg’s proven 500-series reliability is built in. The modular system allows for future configuration changes without specialized tools. The compact 20″ barrel offers excellent balance for indoor maneuverability.
Cons: Aftermarket support for 20-gauge tactical accessories, like magazine tube extensions, is not as vast as for 12-gauge models. The pump action requires practiced manipulation to run effectively under high stress. Some purists may prefer the simpler, fixed-stock setup of a standard model, though the FLEX system doesn’t add complexity to the core firearm function.
Who Is This For?
This shotgun is built for the practical defender who values adaptability. It’s an outstanding choice for a household where multiple adults of different sizes need to be able to use the same firearm effectively. It’s also an excellent option for a shooter sensitive to heavy recoil but who still demands a capable defensive tool. The platform is equally suited for a new gun owner seeking a versatile, user-friendly first shotgun and the seasoned enthusiast who appreciates a configurable system. It ships to Missouri and compliant US states through our network.
Frequently Asked Questions
Q: Can the stock be completely removed for a pistol-grip-only configuration?
A: Yes. The core of the Mossberg FLEX system is a quick-detach interface. The adjustable stock can be removed and replaced with a dedicated FLEX pistol grip module or other compatible stock options in seconds, with no tools required.
Q: Is the 20-gauge powerful enough for home defense?
A: Absolutely. When loaded with modern defensive buckshot (like #3 Buck), a 20-gauge delivers ample penetration and stopping power for personal defense scenarios. The reduced recoil compared to 12-gauge often translates to faster, more accurate follow-up shots—a critical factor in a defensive encounter.
Q: What is the capacity, and can it be increased?
A: The standard tube magazine capacity is 5+1 rounds with the factory plug removed. While aftermarket magazine tube extensions for 20-gauge Mossberg 500 models exist, they are less common than for 12-gauge. The practical solution is to use a shotshell card on the receiver or stock for readily accessible spare ammunition.
Ready to configure a defense shotgun that fits your home and your people? This adaptable Mossberg Flex 500 20 Ga is available at firearms-missouri.com for Missouri residents and nationwide. An FFL transfer is required for firearm purchases.
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