The Venom-SE 10 Rnd Rotary Kit delivers faster cycle times greater shell capacity and lightning fast reloads to your Mossberg 12 gauge transforming your shotgun into a Sidewinder Venom mag-fed tactical shotgun system. Designed for owner installation easy loading and guaranteed reliability the Venom-SE 10 Rnd Rotary Kit offers the ultimate in performance for defense range or competition shooting. - Kits are available for either 590 series or 500 & 88** Mossberg 12 gauge pump shotguns configured with 5/6 shot magazine tubes and 18.5 barrels. See our shotgun compatibility guide to confirm your specific model. - Complete shotgun magazine conversion kit for at home installation includes 10 rnd. rotary magazine forend with action bars magazine tube barrel clamp forend grip M4 style stock emery cloth and installation guide. - Designed for owner installation - Rapid reloads and increased ammunition capacity - Improved firearm versatility and performance - Durable polymer and alloy construction - Guaranteed reliable feeding - 10 round Rotary magazine - Adjustable M4-style stock with pistol grip features custom length-of-pull for proper fit and improved performance - Compatible with 12 gauge -2.75 ammunition - Ambidextrous design - Gauge: 12 -2.75 - Total rounds: 10 - Barrel length: 18 - Choke: Cylinder