Description
The Mossberg 510 Mini Pump 20 Ga 18.5″ 3″ Mossy Oak Obsession Synthetic St is a compact, youth-friendly pump-action shotgun designed for smaller-framed shooters. It features a shortened stock and forend, a 20-gauge chamber, and a durable Mossy Oak Obsession camo synthetic finish, making it an ideal first shotgun for training, small game hunting, or home defense in tighter spaces. This model ships to Missouri and compliant US states.
Key Features
- Compact & Youth-Sized: Shorter length of pull and forend designed for younger shooters or those with a smaller frame.
- 20-Gauge Versatility: Lighter recoil than 12-gauge, making it manageable for training while remaining effective for small game and home defense.
- Mossy Oak Obsession Camo: Durable synthetic stock and forend in a proven woodland pattern for concealment in the field.
- 18.5″ Barrel: Short, maneuverable barrel perfect for navigating brush or tight home defense corridors.
- Pump-Action Reliability: Mossberg’s proven pump-action system for dependable cycling under pressure.
- Dual Extractor System: Provides positive cartridge control for reliable extraction and ejection.
Specifications & Details
| Gauge: | 20 Gauge |
| Chamber: | 3″ |
| Barrel Length: | 18.5 inches |
| Overall Length: | Approx. 38.5 inches |
| Stock: | Synthetic, Mossy Oak Obsession |
| Capacity: | 5+1 rounds |
Weighing in at a light and easy-to-handle 5.5 pounds, the Mossberg 510 Mini is built for control. The 20-gauge chamber handles a wide range of 2¾” and 3″ shells, from light target loads for practice to defensive buckshot. The shortened dimensions mean it fits out of the box for a youth or smaller adult, requiring no immediate modification to get a proper, safe mount. That said, its utility isn’t limited to beginners—its compact form makes it a serious option for a truck gun or a quick-access home defender where a full-size shotgun is too cumbersome.
Who It’s For
This shotgun is built for a specific mission: introducing new shooters to the platform without intimidation. It’s for the parent teaching a teenager to hunt squirrels in Missouri timber. It’s for the smaller-statured individual who needs a defensive tool they can actually wield effectively in a hallway. It’s also for the experienced shooter who recognizes the value of a lightweight, ultra-maneuverable 20-gauge for specific roles where a 12-gauge is overkill or too slow to shoulder.
Pros & Cons
Pros: Reduced size and weight dramatically improve handling for its intended users. The 20-gauge offers a great balance of power and manageable recoil. Mossberg pump-action reliability is legendary. The camo finish is tough and hides wear. At $385.39, it represents a solid value for a dedicated purpose-built firearm.
Cons: The compact size is a drawback for a full-sized adult—it will feel cramped. The 20-gauge, while effective, has less payload options than 12-gauge for defense. The shorter sight radius can be a slight challenge for precise shot placement at longer ranges.
Frequently Asked Questions
Q: Can an adult use this shotgun effectively?
A: Yes, but with a caveat. A full-sized adult will find the length of pull very short, likely requiring a cheek weld more than a shoulder pocket. It’s functional for defensive use at close quarters, but for extended range sessions or hunting, a standard-sized stock is preferable for most adults.
Q: What ammunition is recommended for home defense with this 20-gauge?
A: For home defense, look for 20-gauge buckshot loads from reputable manufacturers like Federal Premium or Hornady. #3 buck is a popular and effective choice that balances pellet count and penetration. Always pattern your chosen load at your expected engagement distances—typically inside 15 yards.
Q: Is the barrel threaded for chokes?
A: The 18.5″ barrel on this model typically comes with a fixed Cylinder bore choke, which is ideal for defensive use and short-range shooting with buckshot or slugs. It is not threaded for interchangeable chokes, which keeps the profile simple and cost down.
When it comes to putting a capable, confidence-building tool in the hands of a new shooter, or securing a highly maneuverable option for close-quarters security, the Mossberg 510 Mini delivers on its design promise. Its specifications are tailored to a clear need, not a compromise. Available at firearms-missouri.com for Missouri residents and nationwide. FFL transfer required for firearm purchases.
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