The Mossberg 930 JM Pro is a competition shotgun designed in collaboration with champion shooter Jerry Miculek. Its extended 9+1 magazine tube, lightened controls, and port-load capability are factory-built for 3-gun competition. The 24-inch barrel provides the legal minimum length with extended magazine. Type: Semi-Auto Shotgun Action: Gas-Operated Caliber: 12 Gauge Capacity: 9 Year introduced: 2012, USA Weight: 7.5 oz Overall length: 44" Status: Active Intended use: 3-Gun Competition, Tactical