FCW Top Rail For Umarex S&W M&P R8 CO2 Revolvers Manufacturer: FCWUpper Rail & Silencer adapterThe Top Rail may fit to Tanaka R8 Pegasus System RevolverFCW Top Rail For Umarex / FCW R8 CO2 RevolversSKU: FCW-KIT-R8TR$6.98PriceQuantityAdd to CartBuy Now