Mossberg SA-20 20 Gauge 28 in. Vent-Rib | 75771

The Mossberg SA-20 All-Purpose Field is a 20-gauge, gas-operated semi-automatic shotgun designed for a soft shooting feel and consistent cycling. This model pairs a 28-inch vent-rib barrel and matte blued metal finishes with a black synthetic field stock to deliver weather-resistant handling and straightforward function. The shotgun ships with Mossberg International’s Sport-Set of five choke tubes and a metal front bead sight, supporting a variety of loads and shot patterns.

Common applications for this configuration include upland hunting and sporting clays or target shooting where reliable autoloading and interchangeable chokes are useful.

Product Specifications

• The manufacturer is Mossberg.
• The model is SA-20 All-Purpose Field.
• The manufacturer part number is 75771.
• The gauge is 20 Gauge.
• The barrel measures 28 inches and features a vent-rib profile.
• The chamber accepts 3″ shells.
• The barrel finish is matte blued.
• The stock material is black synthetic.
• The sighting system is a metal front bead.
• Included choke set is a Sport-Set (5 choke tubes).
• The action is semi-automatic.
• The listed weight is 6 lbs.
• The length of pull is 14 inches.
• The safety is a cross-bolt style.
• The UPC is 884110757715.

The SA-20 All-Purpose Field balances proven gas-operated cycling with a user-friendly feature set: a vent-rib barrel for sighting consistency, a multi-choke sport set for patterning versatility, and a resilient synthetic field stock for use in variable conditions. Its straightforward controls and included choke options make it practical for shooters who want a ready-to-configure 20-gauge platform for upland days or clay-range sessions.

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