Mossberg SA-20 All Purpose Field 20 Gauge Semi-Auto 4+1 26" Barrel

The Mossberg SA-20 All Purpose Field delivers reliable semi-automatic performance in a versatile 20-gauge platform built for upland hunting and sporting applications. This full-size shotgun combines proven gas-operated cycling with practical features that perform across diverse field conditions.

What Makes This Different

The SA-20's gas-operated system cycles 2¾" and 3" shells consistently, eliminating the feeding issues common in budget semi-automatics. The 26-inch ventilated rib barrel provides the swing dynamics needed for crossing shots while maintaining enough length for effective range on waterfowl. Unlike many competitors, this model includes a drilled and tapped receiver for optics mounting straight from the factory.

Key Features

• Gas-operated semi-automatic action cycles 2¾" and 3" 20-gauge shells reliably
• 26-inch ventilated rib barrel with matte blue finish reduces glare and heat mirage
• 4+1 capacity provides adequate firepower for upland birds and small game
• Black synthetic stock resists weather and maintains zero shift in temperature extremes
• Drilled and tapped receiver accepts standard scope bases and red dot mounts
• Removable choke tube system allows pattern customization for different game
• Right-hand ejection with oversized loading port for quick reloads

Field testing shows consistent cycling with loads from light 7/8-ounce target rounds to heavy 3-inch waterfowl shells. The 26-inch barrel generates sufficient velocity for clean kills on pheasants at 40+ yards while remaining manageable in dense cover. The synthetic stock maintains its dimensions through humidity changes and temperature swings that warp wood stocks.

Technical Specs

• Gauge: 20-gauge, 3-inch chamber
• Capacity: 4+1 rounds
• Barrel Length: 26 inches with ventilated rib
• Overall Length: 46 inches
• Weight: Approximately 6.5 pounds
• Stock: Black synthetic with textured grip surfaces
• Finish: Matte blue on barrel and receiver
• Chokes: Accepts standard Mossberg choke tubes
• Safety: Cross-bolt trigger guard safety

The SA-20 All Purpose Field fills the gap between lightweight upland guns and heavy waterfowl models. Mossberg's established parts availability and service network ensure long-term reliability for serious hunters who depend on their equipment season after season.