The MAC Tactical Marine 12 Gauge semi-automatic shotgun features an 18.50" electroless marine nickel steel barrel with integrated Picatinny rail for enhanced durability and tactical versatility. Chambered for 3" shells with a 5+1 capacity.MAC Tactical Marine 12 Gauge Semi-Automatic Shotgun18.50" electroless marine nickel steel barrel for corrosion resistance3" chamber with 5+1 round capacityPicatinny rail on steel receiver for optics mountingBlack fixed synthetic stock for durabilityBlade front and ghost ring rear sightsBeretta/Benelli Mobil choke system with 3 chokes includedOverall length: 47.80" Weight: 6.50 lbsDesigned for marine environments and tactical applications this shotgun combines corrosion-resistant marine nickel finish with reliable semi-automatic operation making it ideal for law enforcement home defense and harsh weather conditions.