Durable full metal one piece construction Compatible with standard M4/M16 airsoft outer barrels Excellent as a replacement or upgrade for models without a front sight Assists in accurate shots when firing at targets close to mid-rage Provides a front sight without having to occupy rail optic rail space In the Box 1X Triangle Sight Specifications: Brand Golden Eagle Build Metal Compatibility Standard M4/M16 Airsoft Outer Barrels Color BLACK California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov