Item #:
048702026478
UPC: #:
048702026478
availability:
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Winchester SX4 Extended Defense 12GA 18" Barrel FDE Finish

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The Winchester SX4 Extended Defense delivers rapid-fire capability and tactical reliability in a platform built for serious defensive applications. This 12-gauge semi-automatic shotgun combines Winchester's proven Active Valve gas system with extended magazine capacity for maximum firepower when it matters most.

What Makes This Different

The SX4 Extended Defense features Winchester's Active Valve gas system that cycles 20% faster than traditional gas systems, enabling follow-up shots in under 0.3 seconds. The extended magazine tube holds up to 8 rounds of 2¾" shells, providing significantly more capacity than standard defensive shotguns. The Flat Dark Earth Cerakote finish offers superior corrosion resistance compared to standard bluing while maintaining a low-profile tactical appearance.

Key Features

  • Active Valve gas system cycles 20% faster than conventional systems
  • Extended magazine tube capacity: 8+1 rounds of 2¾" shells
  • 18-inch barrel with cylinder bore for optimal pattern spread
  • Flat Dark Earth Cerakote finish for enhanced durability
  • Synthetic stock and forend with textured grip surfaces
  • Picatinny rail section for optics and accessories
  • Oversized bolt handle and bolt release for tactical manipulation
The SX4 Extended Defense excels in close-quarters defensive scenarios where rapid target engagement is critical. The shorter 18-inch barrel provides excellent maneuverability in confined spaces while maintaining effective patterns out to 40 yards. The reliable gas system functions consistently with a wide range of loads from light target rounds to heavy buckshot, making it suitable for both training and duty use.

Technical Specs

  • Gauge: 12 gauge, 3-inch chamber
  • Barrel Length: 18 inches, cylinder bore
  • Overall Length: 38.25 inches
  • Weight: 7.2 pounds
  • Magazine Capacity: 8+1 (2¾" shells), 6+1 (3" shells)
  • Stock: Black synthetic with textured grip panels
  • Finish: Flat Dark Earth Cerakote
  • Action: Semi-automatic gas-operated
  • Safety: Cross-bolt trigger guard safety
The Winchester SX4 Extended Defense represents a significant upgrade over pump-action alternatives for users who demand maximum firepower and reliability. Professional agencies and serious defensive shooters choose this platform for its proven performance under stress.