TriStar Viper G2 Realtree Max-4 Camo 12 Gauge 3in Semi Automatic Shotgun - 28in - The TriStar Viper G2 semi automatic shotguns are gas operated that allow you to shoot light targets loads up to heavy pheasant loads. The removable choke system uses a Beretta Mobile thread includes three choke tubes. The bolt remains open after last round is fired. If magazine and chamber are both loaded, opening action will result in ejecting shell from chamber and cycling new shell from magazine into the chamber. If operator desires to unload the chamber only, slightly push lifter up and open action. This cuts the magazine off from cycling a new shell while unloading the chamber. Chamber will remain closed though. The primary safety is located on the backside of the trigger guard. When engaged, the safety is designed to block the trigger, hammer lever and the hammer which makes the firing mechanism immobile. Manual E-Z Load Magazine Cut-Off Fiber Optic Sight 5 Round Magazine - Shot Plug Included Quick Shot Plug Removal Chrome-lined Chamber and Barrel Gas operated semi-automatic Tubular magazine; bottom loading Vent Rib with Matted Sight Plane Waterfowl Soft Touch Camo