B2-4 AIR RIFLE 4.5MM is a break barrel airgun featuring a single cocking system and single shot capability, propelling .177 (4.5mm) caliber projectiles via compressed air. With a precision rifled steel barrel, manual safety, and micro-adjustable rear sight for windage and elevation, this rifle offers accuracy and control. It also features TRUGLO fiber optic sights with contrasting fiber colors and a rubber butt pad for recoil absorption, making it a reliable choice for airgun enthusiasts, with specs including a 550fps muzzle velocity and 1100mm overall length.