The Marble Arms Fiber Optic Front Sight features .375 steel construction with a bright orange fiber optic element for enhanced target acquisition and accuracy.Marble Arms Model 37-MR Fiber Optic Front Sight.375 steel construction for durabilityOrange fiber optic glow element for visibilityUniversal rifle fit compatibilityProfessional grade rifle sight accessoryIdeal for hunters and target shooters seeking improved sight visibility and precision with universal compatibility across rifle platforms.