Large diameter CNC-machined front sight that incorporates a dual-color light gathering fiber optic rod for high visibility and faster sight acquisition even in poor lighting. Universal design fits most shotguns. Gunsmith installation may be required. Fiber diameter is 0.12 inches and length is 0.5 inches. Includes mounting screws. Features: Their largest diameter bead replacement CNC machined Fiber diameter is 0.12 inches Fiber length is 0.5 inches Dual color fiber optic red/green