Winchester® SXP® Shadow Marine Defender 12 Ga 3″ 18″ Barrel


SKU: WIN512328395 Categories: , Tag:

Ready for the wet and wild. The Shadow Marine Defender is the most advanced version of the popular Marine Defender line. Originally conceived for protection for coast bear hunters and seafaring boaters, Everything is designed to protect against the elements while protecting you. The hard chromed plating on major exterior surface and the hard chrome-plated bore make it able to stand up to wet conditions and offer extra protection in salty environments.

Versatile under real use in the field. Yes, this SXP has a specific design purpose, but it also is ready to provide meals around camp with the use of its Invector-Plus interchangeable choke system.

Two user-interchangeable combs and height adjust spacers let you tune comb height on your SXP® Shadow Defender™ and Shadow Marine Defender™ for perfect eye-to-sight alignment with your choice of sighting systems.

The receivers on both Winchester Super X® Pump Shadow Defender™ shotgun models are drilled and tapped for Winchester scope bases and rings, allowing you to easily attach an optional scope or electronic sight to fully utilize the incredible accuracy of today’s shotgun slug ammo.


  • Matte Hard Chrome Plating on the barrel, magazine tube and slide arms for added resistance to wear and the elements
  • Synthetic Pistol Grip Stock with Textured Gripping Surfaces give your hands a sure, non-slip grip and the non-glare matte black finish won’t give you away
  • Two Interchangeable Comb Pieces allow you to fine-tune drop at comb for use with iron, electronic or optical sights
  • Two Interchangeable Length of Pull Spacers allow you to fine-tune length of pull for a perfect stock fit
  • Tactical Ribbed Forearm for better control when you need it most
  • Hard Chrome-Plated Chamber and Bore make these surfaces highly resistant to wear and corrosion
  • Invector-Plus Cylinder Choke Tube handles both slugs and buckshot
  • 3″ Chamber gives you the ability to reach out for challenging shots
  • Black Chrome Protection on the bolt and other components lasts longer than traditional bluing
  • Traditional Brass Bead Front Sight plus a removable TRUGLO® fiber-optic sight offer a fast, natural sight picture
  • Alloy Receiver is drilled and tapped for scope bases
  • Rotary Bolt with four massive lugs provides strength, support and solid lockup
  • Crossbolt Safety is easily operated, even with gloves
  • Inflex Technology Recoil Pad directs “felt recoil” down and away from your cheek


Action Pump Canada Legal Classification Non-Restricted
Handedness Ambidextrous Ejection Right
Stock Composite Stock Finish Matte Black
Buttpad Rubber Inflex 1, Small Adjustable Length of Pull No
Length of Pull (in) 13 3/4 Adjustable Comb or Cheekpiece Supplied Cheekpiece
Drop at Comb (in) 1 3/8 Drop at Heel (in) 1 5/8
Grip Type Modern Pistol Textured Panels Pistol Grip Cap None
Trigger Guard Size Enlarged Trigger Guard Material Composite
Trigger Guard Finish Matte Black Trigger Guard Engraving None
Safety Trigger Guard Mounted 2 Position Cross Bolt Trigger Material Steel
Trigger Finish Matte Black Trigger Pull (lbs) ~6.5
Bolt Release Behind Trigger Left Side Magazine Type Fixed Tube
Magazine Capacity (2 3/4″ Shells) 5 Forend Composite Textured
Forend Finish Matte Black Receiver Material Aluminum Alloy
Receiver Finish Matte Black Bolt Slide Finish Matte Black Chrome
Optic Interface Drilled and Tapped Rear Sight None
Front Sight Fixed Truglo Green Fiber Optic; Fixed Brass Bead Barrel Material Steel
Barrel Profile Standard Barrel Finish Matte Chrome
Chamber Finish Chrome Plated Bore Finish Chrome Plated
Choke Cylinder Choke Family Invector-Plus Flush
Overall Length (in) 38 1/2 Weight 7 lbs 8 oz
Accessory Interface Sling Swivel Buttstock; Picatinny Rail Barrel Band Sling Swivel Studs Matte Nickel
Choke Wrench Included Flat Wrench

Additional Information:

The experience of the Super X Pump is real. Pick up the Winchester® Super X Pump shotgun and experience the light weight, centered balance and instant pointability firsthand. The Super X design provides you with the fastest follow-up shots. No other pump offers the feeling of an inertia-assisted slide-action that can deliver three shots in a half second.

The world’s fastest pump action shotgun. Whether its super-speed clays or fast-flushing upland game, keep up with shooting’s fastest action with the Super X Pump, the perfect choice for pump shotgun lovers. Because of its inertia-assisted slide-action, it’s the fastest in the world for follow-up shots. Three shots can be delivered in just a half second. Cycle one through and see if it’s not the finest fitting, sweetest handling and fastest pump out there.

Back-Bored Technology is based on extensive research and testing to find the secret to tighter, more consistent patterns. Instead of the traditional bore size of .729″, this research shows the ideal 12 gauge interior diameter is .742″. In 20 gauge barrels the ideal bore diameter is .630″ instead of the standard .618″. If the bore is any larger the gases will blow by the shot cup and reduce pellet velocity. If the bore is too tight the pellets are deformed as they pass through the forcing cone, causing poor ballistic performance.

Chrome-Plated Chamber and Bore are critical for today’s steel and Hi-Density (HD) shot. Hard chrome makes the surfaces highly resistant to wear and gives you superior protection from rust and corrosion. That’s why all smoothbore Super X® Pump shotguns feature a hard-chromed chamber and bore.

From the duck blind to the firing line, the INVECTOR-PLUS™ Choke Tube System is the world’s most consistent. The Super X® Pump comes with full, modified and improved cylinder flush-mounted choke tubes so the gun is ready for anything, right out of the box.

Speed-Plug System makes it easy to remove the three-shot adaptor. Just remove the magazine cap, push on the spring retainer holding the spring in place, twist and remove the adaptor. This trouble-free design that lets the shooter “pull the plug” in mere seconds without tools.

The Trigger Guard on the Super X® Pump has been redesigned with a larger opening. A larger, Ambidextrous “Safety” Button has also been added and can be reversed to offer easier operation for left-handed shooters.

Drop-Out Trigger Group is simple to remove. Push out one pin and pull the complete trigger system out for cleaning, lubrication and inspection. It’s an easy way to keep the Super X® Pump shotgun in top shape, regardless of nasty weather or gritty shooting conditions.

Four massive Rotary Bolt Lugs provide support, strength and solid lockup in the barrel of the lightning-fast Super X® Pump. Under recoil, the mass of the shooter slows the rearward travel of the shotgun, while the inertial motion of the bolt, slide and forearm continue cycling the action to give a head start ejecting the fired shell.

The Super X® Pump has the best recoil pad ever put on a shotgun. Directional rib structures inside the INFLEX® Technology Recoil Pad help channel the recoil impulse by moving the comb down and away from the cheek. The pad’s smooth textured surface makes shouldering the Super X Pump snag free.

A pair of robust steel Action Guide Bars eliminate the twisting and binding that waste time and energy when cycling the action.

Black Chrome Finish on the bolt, barrel, slide, action bars and other parts protects better than conventional bluing and stands up to years of wear and harsh conditions.

Durable E-Coating on the magazine tube helps protect it from wear and corrosion to keep it looking sharp for years to come.

Part Number 512328395


Manufacturers, importers, suppliers, and distributors may make changes to their products without fanfare. Such changes can lead to discrepancies between the advertised product and the actual product in inventory. While International Shooting Supplies Ltd. endeavors to correctly describe the actual product in inventory, we will not be responsible for unintentional inaccuracies in text and images of the advertised product.

Weight 4.1 kg
Dimensions 106 × 23.7 × 7.7 cm

12 Gauge





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