Description
The Mossberg 500 FLEX AP Pump 12 ga 28″ 3″ Black Synthetic Stock Blued is a versatile, all-purpose pump-action shotgun built on Mossberg’s legendary 500 series platform. It features the innovative FLEX system, allowing you to quickly swap stocks, forends, and accessories to configure the shotgun for hunting, home defense, or tactical use without tools. This model comes ready with a 28-inch vent-rib barrel optimized for field use and a durable black synthetic stock. It’s a reliable, adaptable workhorse priced at $405.22.
Key Features
- Mossberg FLEX System: Modular design lets you change the shotgun’s configuration in minutes. Swap from a field stock to a pistol grip or tactical setup as your needs change.
- Proven 500 Action: Built on the same rugged, time-tested pump action trusted by military, law enforcement, and hunters for decades.
- 28″ Vent-Rib Barrel: Provides a long, smooth swing for clay targets and waterfowl. The vent rib reduces heat mirage and aids in quick target acquisition.
- Dual Extractors & Steel-to-Steel Lockup: Enhances reliability and ensures positive extraction and ejection, even with a wide range of 12-gauge loads.
- Ambidextrous Safety: A tang-mounted, easy-to-reach safety can be operated naturally with your thumb, whether you’re right or left-handed.
- Black Synthetic Stock: Offers weather-resistant durability that stands up to rain, mud, and rough handling in the field.
Specifications & Details
| Gauge: | 12 Gauge |
| Chamber: | 3″ |
| Barrel Length: | 28″ |
| Overall Length: | Approx. 48.5″ |
| Capacity: | 5+1 Rounds |
| Weight: | Approx. 7.5 lbs |
| Stock: | Black Synthetic |
| Finish: | Blued |
Who This Shotgun Is For
This is the shotgun for the shooter who demands one platform to handle multiple roles. It’s for the Missouri hunter who wants a reliable waterfowl or turkey gun on Saturday but values the option to reconfigure it for home defense duty by Monday. The FLEX system means no gunsmithing required for those changes—everything is drop-in ready. When it comes to a first shotgun that can grow with your needs, the 500 FLEX AP is a pragmatic choice. It’s also ideal for the prepper or landowner who needs a durable, simple tool for property defense and occasional hunting, all without breaking the bank. The 28-inch barrel and 7.5-pound weight make it manageable for extended carries in the field.
Pros & Cons
Pros: The modularity is the star here. You’re not buying one shotgun; you’re buying a system. The FLEX ecosystem is extensive, compatible with a wide range of Mossberg-branded stocks, forends, and shell carriers. Reliability is a given with the Mossberg 500 action. The price point is accessible for a feature set this robust. The synthetic stock and blued finish require minimal maintenance, which is perfect for harsh conditions.
Cons: The 28-inch barrel is long for indoor defensive use, though the FLEX system allows you to purchase and install a shorter barrel separately. The basic synthetic stock may feel utilitarian compared to wood, but that’s the trade-off for durability and lower cost. Here’s the thing—you’re investing in the platform’s potential, so future configurations are an additional expense.
Frequently Asked Questions
Q: Can I put a shorter barrel on this for home defense?
A: Absolutely. The Mossberg 500 FLEX AP is designed to accept any Mossberg 500 barrel that fits the action tube length. You can purchase an 18.5″ tactical barrel separately and swap it in under a minute with no tools. This modularity is the core benefit of the FLEX system.
Q: What chokes does the 28″ barrel use?
A: This barrel is typically threaded for Accu-Choke tubes (Mossberg’s choke system). It often comes with a Modified choke tube installed, which is a great all-around choice for hunting. You can purchase additional tubes like Full or Improved Cylinder for specific game or shooting sports.
Q: Is the receiver drilled and tapped for a optic mount?
A: Yes, the receiver is pre-drilled and tapped, making it easy to mount a scope base or a Picatinny rail for a red dot sight. This is a huge advantage if you want to set this up for turkey hunting or slug shooting with a precise optic.
Ready to configure your own versatile shotgun platform? This Mossberg 500 FLEX AP Pump is available at firearms-missouri.com for Missouri residents and nationwide. An FFL transfer is required for firearm purchases.


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