The Mossberg 500 Tactical Tri-Rail adds a factory-installed tri-rail forend that accepts standard Picatinny accessories including lights, lasers, and foregrips, making it a more fully configured tactical platform out of the box. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 6 Year introduced: 2010, USA Weight: 7.75 oz Overall length: 38.5" Status: Active Intended use: Tactical/Home Defense