The Mossberg 500A is the specific 12-gauge variant of the iconic Mossberg 500 pump-action shotgun family. Introduced in the 1960s, it is one of the most widely produced and field-proven firearms in history, utilized heavily by military, law enforcement, and civilian hunters. FAIR CONDITION NO BOX Caliber/Gauge: 12 Gauge (3-inch chamber; handles 2.75" and 3" shells) Action: Pump-Action (Slide-Action) Standard Capacity: 5+1 rounds (with standard 2.75" shells and a 18.5" or 28" barrel) Barrel Lengths: Typically 18.5" or 20" (Riot/Defensive) or 24" to 28" (Hunting/Field) Choke: Cylinder Bore (on 18.5" defensive models) or Accu-Choke interchangeable system (on field models) Weight (Unloaded): ~6.75 lbs to 7.25 lbs (depending on barrel length and wood vs. synthetic furniture) Overall Length: ~38.5 inches (with an 18.5" barrel) up to ~47.5 inches (with a 28" barrel)