The jts m12ak t1 mlok feaures a 18.70" chrome lined barrel; accepts 2 3/4" or 3" shells; 4-position adjustment gas system; aluminum forearm with mlok slots; slinglock and rem choke configuration.Includes two magazines.Action: Semi-AutoGauge: 12 GaugeBarrel Length: 18.70"Capacity: 5+1Chamber: 3"Oal: 39.29"Choke Configuration: Rem ChokeSights: Picatinny RailBarrel Description: Chrome Lined SteelBarrel Length Range: 18" to 18.99"Stock Finish Group: BlackMetal Finish Group: Blued/Black