GLOCK MOS Adapter Plate 01 Set (Pkg) 9mm - G17, G19, G45, G47, G34 Fits Optic Doctor, Meopta, Insight, Vortex, Burris 74008 The GLOCK MOS Adapter Plate 01 is designed to allow users to seamlessly mount red dot optics to the slide of their compatible Glock Gen 5 handgun. This plate is compatible with a range of MOS pistols" including the G17" G19" G45" G47" and G34.