Specifically engineered for use with optics-equipped Glock® pistols, the Ameriglo® 4XL Optic Compatible Sights for Glock Models features a tall black serrated front sight and tall rear steel sight, engineered to deliver quick, intuitive reticle and target acquisition. Better yet, steel construction offers unmatched strength and lasting rigidity, while the corrosion-resistant Nitride finish easily repels water, dirt, dust, and more for added reliability.