These adapter rails can be used to mount the R-99 optics onto a Picatinny Rail for use with an Airsoft weapon.
Please see this video about the Picatinny Rail Adapter for details on how the rail adapters works.
The short rail matches the length of the R-99 Digital Threat and HCOG "Bruiser" optics. The long rail matches the length of the R-99 Variable Holo optic.
The rail adapters are not compatible with the RE-45 optics.
