The Mossberg 500A is the 12-gauge variant of the classic Mossberg 500 pump-action shotgun series. In Mossberg’s model designation system, the letter "A" specifically denotes 12 Gauge (with "B" representing 16-gauge, "C" for 20-gauge, and "E" for .410 bore).  Pistol grip stock, cruiser style.

Key Specifications & Features

  • Action: Manual pump-action

  • Gauge / Chamber: 12 Gauge with a 3-inch chamber (fires both 2-3/4" and 3" shells)

  • Capacity: Typically 5+1 or 7+1 rounds depending on the magazine tube length

  • Receiver: Lightweight anodized aluminum alloy, drilled and tapped on modern variations for scope/optic mounts

  • Safety: Ambidextrous top-mounted thumb safety located at the top rear of the receiver

  • Action Bars: Dual action bars to prevent binding during rapid cycling

  • Locking Mechanism: Steel-to-steel bolt lockup into the barrel extension