The Winchester SXP Marine Defender is a purpose-built 20 gauge pump-action shotgun offered with an 18-inch matte chrome barrel and a 3-inch chamber. Its matte black aluminum-alloy receiver and black synthetic pistol-grip stock provide durable corrosion resistance for use in wet or coastal environments. The configuration includes a TruGlo fiber optic front sight and an Invector-Plus cylinder bore choke for straightforward patterning.
Key Specifications
- The gauge is 20 Gauge.
- The barrel length is 18 inches.
- The chamber accepts 3″ shells.
- The action is a pump-action design.
- The capacity is 5+1.
- The unloaded weight is approximately 6.25 lbs.
- The receiver is finished in matte black aluminum alloy.
- The barrel and chamber feature a matte hard chrome finish.
- The stock is a black synthetic piece with a pistol grip and interchangeable combs.
- The sight system includes a TruGlo fiber optic front sight.
Built for durability and straightforward operation, the SXP Marine Defender is suitable for recreational shooting, marine and wet-weather use, and close-range utility or home defense roles where corrosion resistance and reliable cycling are priorities. Its combination of synthetic furniture, hard-chrome bore and chamber, and a proven pump-action design delivers a low-maintenance platform for regular use.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




