The Scoremaster 511 series is a .22 caliber, bolt action, detachable magazine-fed rifle manfactured by Remington Arms between 1939 and 1963, and 1965 and 1967. The Scoremaster 511 has a 25" barrel, a one piece hardwood stock, and a blued metal finish. As the Scoremaster 511 was manufactured before 1968, these rifles do not have serial numbers. A two or three letter date code (indicating manfacture date) is stamped on left side of the barrel next to the receiver.