The 5x Magnifier with Extra High Ring by Barska works in combination with red dot or electro sight to magnify image,resulting in increased accuracy. Can also be used as a hand held magnifier. 100% Waterproof, fogproof and shock-resistant. Fully coated optics provide crisp clear images. Includes picatinny/weaver style mounting ring. Backed by Barska's 1 Year Limited Warranty.