The B1-4 Air Rifle is a 4.5mm break barrel airgun featuring a single cocking system and single shot capability. With a precision rifled steel barrel, manual safety, and micro-adjustable rear sight for windage and elevation, this rifle offers accuracy and control. Additionally, it 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 500fps muzzle velocity and 990mm overall length.