The Marble Arms Model 41-MR front sight is specifically designed for .410 caliber rifles with a precision 1/16 inch ramp-mounted design and durable brass gold finish.Marble Arms Model 41-MR Front Sight.410 caliber rifle compatibility1/16 inch ramp-mounted configurationBrass gold construction for durability and visibilityProfessional-grade rifle sight componentIdeal for hunters and shooting enthusiasts looking to upgrade or replace their .410 rifle's front sight with a reliable precision-engineered component from trusted manufacturer Marble Arms.