The Marble Arms #63H is a precision dovetail rear sight designed for universal rifle compatibility with a distinctive short flat top shank configuration.Marble Arms Model #63H Dovetail Rear SightShort flat top shank designUniversal rifle mounting compatibilityBlack finish for durability and reduced glareDovetail mounting system for secure installationIdeal for rifle enthusiasts seeking reliable iron sights with traditional styling and proven performance for target shooting and hunting applications.