The Marble Arms 41-W Front Sight is a precision barrel-mounted rifle sight designed for .410 caliber firearms with durable brass gold construction.Marble Arms Model 41-W Front Sight.410 caliber rifle compatibility1/16" precision sizingBarrel-mounted design for secure installationBrass gold finish for durability and visibilityEssential for accurate shooting and target acquisition this professional-grade front sight provides reliable performance for hunting and target shooting applications.