The M14SCSB (Stripper Clip Sight Base) is a 1913 Picatinny Rail insert specifically designed for use on Mil-Spec M1/M14 rifles that are installed in a SAGE EBR Chassis Stock System. Features: Precision machined from ordnance grade steel Replaces existing stripper clip guide Permits in-line mounting of scoped optics Insures that the scope maintains zero Allows clear through access to the ejection port Phosphate finish Made in the U.S.A.