The TriStar Viper Series Semi Automatic Gas Operated Shotguns are reliable, functional and hard working. Both wood and synthetic models have 3" gas operated, semi-automatic shotguns that allow you to shoot light target loads to heavy waterfowl loads interchangeably. Removable choke system uses Beretta/Benelli Mobil Threads, includes three choke tubes (IC, M, F), choke box, and wrench. Rubber Recoil pad, Fiber optic sight and shim kits standard.Features :Manual E-Z Load Magazine Cut-offVent Rib with Matted Sight PlaneFiber Optic Front Sight3 Beretta/Benelli Mobil Style Chokes (IC, M, F)5 round Magazine - Shot Plug IncludedChrome-lined Chamber and BarrelSoft Touch on all Synthetic ModelsShim kits standard