The Marble Arms 37-MR Fiber Optic Front Sight features a .375 inch steel construction with a green fiber optic element for enhanced target acquisition and improved accuracy.Marble Arms 37-MR Fiber Optic Front Sight.375" diameter for precise fitmentSteel construction for durabilityGreen fiber optic glow element for visibilityDesigned for rifle applicationsThis front sight provides excellent visibility in various lighting conditions making it ideal for hunting target shooting and tactical applications where quick and accurate sight alignment is essential.