The Mossberg 590A1 is the most durable of our pump action shotguns, meeting MIL-SPEC 3443G, with its heavy-walled barrel, metal trigger guard and safety, clean out mag tube, and Parkerized finish. Its hearty construction and proven endurance make it a prime choice for home defense applications. SKU 51773 Gauge 12 Gauge Action Type Pump-Action Chamber Size 3" Usage Security Barrel Type Heavy-Walled Barrel Length 20" Barrel Finish Parkerized Choke Cylinder Bore Capacity 8+1 Length 39.5" LOP 12.25"- 14.25" LOP Type Adjustable Sights XS Ghost Ring Stock Magpul SGA/MOE Weight 7.25 UPC 015813517737