This listing is for: Wiliams Rear Sight For Crosman 2300S. The sight can be easily adjusted for both windage and elevation using the turrets. Compatiable with many other Crosman airguns provided that they are equipped with the steel breech kit. For Benjamin and Crosman Parts we offer discounted shipping if you order more than one item! Please contact us if you have any questions. Please check these are the parts that are needed before ordering: No returns unless item does not match the listing description / arrives damaged. Ships quickly and carefully with USPS Ground Advantage.