Our EasyHit Fiber Optic Sighting System is the safest and best way to shoot. Easily attach EasyHit Shotgun Sights with an adhesive strip to any ventilated or solid rib or flat surface (and ported barrels). It's low profile won't change your point of impact and the hollow tube design helps shooters use both eyes when acquiring their sight picture. - Features & Benefits - Quickly and safely acquire sight picture - Fits any ventilated solid rib or flat surface - Can be mounted to ported barrels - Enables shooters to keep both eyes open - Ensures proper shooting form - Available in 2.5mm & 3mm diameter fluorescent green and red - Available in both 2.75 and 5 lengths