Ultra lightweight / compact design (weighs 3.8 ounces). Ultra-tough composite construction. Innovative pin design improves sight picture and protects fibers. Quick and easy fiber replacement. Aperture has 1.8” inner diameter. Large circular field of view. Includes level. Reversible bracket for greater vertical adjustability. Glow-in-the-dark shooter’s ring. Adjustable for left and right handed users. Micro push-button light included. Accepts any Apex Gear or TRUGLO light (sold separately).