Mossberg 51608 590S Compact 12 Gauge Pump 3" 9+1 18.50" Drilled & Tapped Receiver, Synthetic Stock
The 590S Series cycles 1.75", 2.75" or 3" shells. No need for mini shell adaptor. Pick one shotshell length for specific shooting needs or simultaneously load any combination of those shell lengths. *Capacity 5+1, 6+1, 9+1.