Q TOPRAIL-FIX-1913-8.5IN The FIX 1913 8.5" Top Rail The Q LLC. FIX 1913 8.5" Top Rail identified by the model TOPRAIL-FIX-1913-8.5IN is designed for The FIX by Q. ThisQTOPRAIL-FIX-1913-8.5IN M1913 Top Rail provides compatibility for attaching accessories including optics and night vision devices allowing users to customize their firearm. With a length of 8.5 inches this top rail offers a compact yet versatile platform for enhancing the functionality and adaptability of The FIX rifle by Q.The M1913 Top Rail designed for use with The Fix by Q facilitates the attachment of accessories such as optics night vision devices and other enhancements. This compatibility allows users to customize their firearm expanding its functionality by adding various accessories tailored to their specific needs and preferences.