DEUCE CO-WITNESS RISER MODEL: SDCWR The SDCWR is a co-wittnessing riser kit designed specifically for the Deuce Projectile Launcher. It allows for EOTech® or Aimpoint® electronic sights to be co-witnessed with the Sage Detachable Sight Kit. This item consists only of the co-witness riser and mounting hardware. It cannot be used unless the SDSRK and the SDSK component kits have been purchased or are installed on the Deuce Launcher.