The optimus break barrel is available in.177 caliber and is both powerful and elegant.It features a handsome, ambidextrous, hardwood stock with a relatively light cocking force and a two-stage adjustable trigger.The optimus is built to get the job done with velocities up to 1200 fps using alloy pellets.The barrel incorporates a micro-adjustable rear sight and fiber optic front sight.The optimus comes equipped with a 4x32mm scope.Oal: 45"Type: Air RifleAction: Break OpenCaliber: 177 PelletCapacity: 1Finish: BlackBarrel Length: 24"Sights: Fiber Optic Front, Adjustable RearWeight: 7.10 lbsStock: HardwoodScope: 4x32mmMagnification: 4xBarrel Type: Rifled SteelVelocity: 1200 fpsPower Type: Spring Piston