The Marble Arms 41-MR Fiber Optic Front Sight provides enhanced target acquisition with fiber optic glow technology in a durable steel construction with orange fiber.Marble Arms 41-MR Fiber Optic Glow Front Sight.410" specification for precise fitSteel construction for durabilityOrange fiber optic for enhanced visibilityDesigned for rifle applicationsIdeal for hunters and shooters seeking improved sight picture and faster target acquisition in various lighting conditions.