Crosman MK45 Air Pistol is a CO2 powered BB pistol with a steel smooth bore barrel and a dual-tone polymer frame.This handgun uses semi auto repeater operation with a quick release 20 round drop out magazine for consistent backyard target shooting and practice.It also features a removable grip for easier CO2 changes fixed open sights and a Picatinny accessory rail.Key Features4.5 in. steel smooth bore barrel for BB ammunitionCO2 powered semi auto repeater operationQuick release 20 round drop out magazineRemovable grip; fixed open sights; Picatinny accessory railCrosman is known for producing airguns built around practical performance accessible operation and broad recreational appeal.The brand is widely recognized for offering BB guns pellet guns and related shooting products that emphasize straightforward handling modern utility and value focused design.Crosman products remain a practical option for shooters looking for dependable airgun performance across training recreational and backyard shooting applications.