The new generation of officially licensed GLOCK BB and airsoft guns are here and these new products are optics ready. Using a MOS ready slide, users can fit the most common pistol optics, like red dot sights, to their Modular Optic System (MOS) ready GLOCK BB, Pellet, or Airsoft pistol. There are four adapter plates in this kit. Footprints covered by these plates include the Vortex Viper/Docter Sight C, Trijicon SRO, C-More STS 2, Leupold Deltapoint/Shield RMSx/c. The plates in this kit will ONLY work on Umarex licensed GLOCK Type MOS 1 airguns and airsoft. Will not work with GLOCK air-powered models that already have optic plates included with the gun or Type MOS 3 airguns and airsoft. The Umarex RDS8 red dot sight is lightweight and works well with MOS ready GLOCK airsoft guns and air pistols.