A recoil force mitigating device for cooperating with a firearm to mitigate recoil forces imparting undesirable forces to mounted firearm accessories. The recoil force mitigating device includes a recoil rail assembly having a first rail for mounting to the firearm and a slideable second rail for mounting accessories. A recoil force mitigating means is positioned between the first and second rails to mitigate transfer of forces, such as recoil forces, from the first rail to the second rail.