Kansas Gunshop is a Wichita, KS-based retailer specializing in firearms and accessories. The Remington Model 870 Special Purpose Marine Magnum is a corrosion-resistant 12-gauge pump-action shotgun built for harsh environments. Its nickel-plated finish and synthetic stock make it ideal for marine or humid conditions. Available now for $299.00 with same-day shipping from our Kansas facility.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
Remington 870 Marine Magnum Specifications
| Product Type | Pump-action shotgun |
|---|---|
| Gauge | 12 gauge |
| Barrel Length | 18″ cylinder bore |
| Overall Length | 38.5″ |
| Weight | 7 lbs |
| Capacity | 4+1 rounds |
| Finish | Nickel-plated metal surfaces |
| Stock Material | Synthetic |
| Choke | Fixed cylinder |
| Country of Origin | USA |
| Condition | New in box |
| SKU | REM-870-MM |
Key Features
- Marine-grade corrosion resistance with nickel-plated metal surfaces
- 18″ cylinder bore barrel for reliable patterning
- Synthetic stock won’t swell or warp in wet conditions
- Proven Remington 870 action with dual action bars
- Includes front bead sight and extended magazine tube
Who This Shotgun Is For
Buy it if:
- You need a reliable marine/boat shotgun
- You live in humid or coastal environments
- You want a no-frills defensive shotgun
- You prefer the simplicity of pump-action reliability
Skip it if:
- You need a hunting shotgun (consider our hunting shotguns)
- You prefer tactical accessories (see our tactical shotguns)
- You want a lighter-weight option
Remington 870 Marine Magnum Pros & Cons
Pros:
- ✅ Outstanding corrosion resistance for marine use
- ✅ Proven 870 reliability with simple maintenance
- ✅ Synthetic stock handles abuse well
- ✅ Good balance for quick handling
- ✅ Classic design with modern durability
Cons:
- ❌ Fixed choke limits versatility (aftermarket barrels available)
- ❌ Basic sights compared to some tactical models
How It Compares
| Feature | Remington 870 Marine | Mossberg 500 Mariner | Turkish Import Marine |
|---|---|---|---|
| Material | Nickel-plated steel | Stainless steel | Chrome plating |
| Quality | Proven US-made | Good alternative | Questionable |
| Action | Pump | Pump | Pump |
| Price | $299 | $329 | $199 |
| Durability | Excellent | Very good | Fair |
Frequently Asked Questions
Is the Remington 870 Marine Magnum good for home defense?
Yes, its 18″ barrel and reliable action make it an excellent choice for home defense, especially in humid environments where corrosion resistance matters.
What makes the Marine Magnum different from standard 870s?
The Marine Magnum features nickel-plated metal surfaces and synthetic furniture specifically designed to resist corrosion in wet/salty environments.
Can I use slugs in the Marine Magnum?
Yes, the cylinder bore choke handles slugs well, though accuracy may vary compared to rifled barrels.
Where can I buy Remington 870 shotguns online?
Kansas Gunshop (kansas-gunshop.com) carries the full Remington 870 lineup with fast shipping from Wichita, KS.
Does this come with any accessories?
The Marine Magnum ships as a standalone shotgun – we offer aftermarket accessories separately.
What’s the warranty on Remington firearms?
Remington offers a limited lifetime warranty to the original purchaser against defects in materials and workmanship.
Can I add a magazine extension?
Yes, though you may need to consult local laws regarding capacity restrictions first.
✅ Same-day shipping from Wichita, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Shotguns | Shotgun Ammo | Full Shop
As a Kansas-licensed FFL dealer since 2008, I’ve handled hundreds of Remington 870 shotguns. The Marine Magnum stands out for its specialized corrosion resistance while maintaining the 870’s legendary reliability. This review reflects hands-on experience with this model in our Wichita shop.
Last updated: April 2026
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