Description
The Mossberg 500 Mariner Tactical 12 GA 18.5″ Marinecote Finish, Tactical Stock is a purpose-built, corrosion-resistant pump-action shotgun designed for harsh environments and close-quarters defense. It combines Mossberg’s legendary 500-series reliability with a specialized protective finish and a compact 18.5-inch barrel, making it a formidable tool for coastal, marine, or high-humidity home security scenarios.
Key Features
- Marinecote Finish: A proprietary electroless nickel plating that provides superior corrosion resistance against saltwater, humidity, and harsh elements.
- Tactical Configuration: Features an 18.5-inch cylinder-bore barrel for optimal maneuverability in tight spaces and effective pattern spread at defensive distances.
- Dual Safety System: Includes a top-mounted, ambidextrous tang safety for intuitive operation and a trigger-blocking safety for added security.
- Dual Extractors: Enhances reliability by providing positive cartridge extraction under all conditions.
- Anti-Jam Elevator: The shell lifter stays in the “up” position when the action is closed, preventing thumb pinch and facilitating smoother loading.
- Tactical Stock: Designed for a solid, repeatable cheek weld and control, often featuring a pistol grip or traditional configuration for user preference.
Specifications & Details
| Specification | Detail |
|---|---|
| Gauge | 12 Gauge (3″ Chamber) |
| Barrel Length | 18.5 inches | Overall Length | Approx. 39.5 inches |
| Finish | Marinecote (Electroless Nickel) |
| Capacity | 5+1 Rounds (with included plug) |
| Weight | Approx. 7.5 lbs |
This shotgun is built on the proven Mossberg 500 action, a platform trusted by military and law enforcement units worldwide. The 18.5-inch barrel keeps the overall length manageable, coming in around 39.5 inches for easy storage in a vehicle cabin or quick access in a hallway. With a weight of roughly 7.5 pounds, it offers a stable platform that absorbs recoil effectively without being cumbersome. The 3-inch chamber handles a wide range of 12-gauge loads, from light target rounds to powerful defensive buckshot. Here’s the thing—while it’s built for the elements, its tactical prowess in any home defense scenario is undeniable.
Who This Shotgun Is For
This Mariner is for the individual who prioritizes durability and reliability above all else. It’s the ideal choice for boat owners, coastal residents, or anyone living in a high-humidity climate where standard blued finishes can fail. When it comes to home defense, it’s for the person who wants a simple, mechanically proven system that will function when needed, regardless of environmental conditions. It also serves well as a rugged truck or ranch gun where exposure to the elements is a constant factor. The design is drop-in ready for many standard accessories, requiring no gunsmithing for basic upgrades like sling mounts or lights compatible with Mossberg 500 forends.
Pros & Cons
Pros: Exceptional corrosion resistance is the headline feature, making it virtually maintenance-free in wet environments. The Mossberg 500 action is famously reliable and simple to operate under stress. The tang safety is arguably more intuitive for a defensive long gun than a cross-bolt design. The 18.5-inch barrel provides excellent balance and pointability in close quarters.
Cons: The Marinecote finish, while incredibly durable, shows scratches and wear marks more readily than a matte parkerized finish. At $549.23, it carries a premium over standard finished tactical models, so you’re paying specifically for that corrosion protection. The tactical stock configuration may not suit every shooter’s ergonomic preference for recreational use.
Frequently Asked Questions
Q: Can I use this shotgun for hunting, or is it strictly for defense?
A: While its 18.5″ cylinder-bore barrel and sights are optimized for close-range defensive use, it is perfectly capable of hunting at short ranges, particularly for pests or with slugs in areas where rifle hunting is not permitted. For dedicated bird or deer hunting at longer ranges, a longer, choked barrel would be more appropriate.
Q: What kind of maintenance does the Marinecote finish require?
A: Significantly less than a blued steel finish. Basic cleaning to remove fouling and a light coat of oil on internal parts is sufficient. The exterior is highly resistant to rust, so a simple wipe-down after exposure to saltwater or moisture is typically all that’s needed to keep it in top condition.
Q: Is the stock interchangeable?
A: Yes. The Mossberg 500 uses a standard receiver configuration, making it compatible with a vast aftermarket of stocks and forends from brands like Hogue, Magpul (for models like the SGA stock), and ATI. This allows you to easily customize length of pull or grip angle to fit your needs.
This is a tool built for a specific, demanding purpose, and it executes that role without compromise. Its value lies in its unwavering readiness, whether stored on a damp boat or in a humid basement closet. For Missouri residents and shooters nationwide seeking a defensive shotgun that can truly handle the elements, the Mossberg 500 Mariner Tactical represents a smart, long-term investment in proven performance. This model is available at firearms-missouri.com for Missouri residents and nationwide, with an FFL transfer required for firearm purchases.
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