This air rifle from marksman is a.177 caliber pellet combo.It comes equipped with a 4x32mm scope, along with adjustable truglo fiber optic sights, a rifled steel barrel, a black synthetic stock with a raised cheek comb, and an automatic cross bolt safety.Type: Air RifleAction: Break OpenCaliber: 177Capacity: 1Finish: BlackSights: 4x32mm ScopeWeight: 7.70 lbsStock: Black PolymerScope: 4x32mmMagnification: 4xBarrel Type: Rifled SteelVelocity: 830 fps