The Marble Arms 41-MR front sight features green fiber optic technology for enhanced target acquisition and improved accuracy in various lighting conditions.Marble Arms Model 41-MR Front SightGreen fiber optic for bright visible sight pictureSteel construction for durability and reliabilityUniversal design compatible with most riflesEnhanced visibility in low-light conditionsIdeal for hunters and sport shooters seeking to upgrade their rifle's front sight system with reliable fiber optic technology for faster target acquisition and improved shooting performance.