The Radian GUARDIAN Optic Guard provides unprecedented protection for your pistol red dot optic. Machined from 7075 aluminum and hard anodized, the design provides top/front/side impact protection. STUD-LOK threaded stud/nut mounting interface is a secure system. It provides much longer thread engagement, greater hold down power, with increased shear resistance. TRU-SEAL eliminates the need for an added sealing plate. Pre-installed O-rings on the mounting screws hold the plate watertight to the slide, sealing out moisture, eliminating corrosion in the mounting threads.Specifications:Manufacturer: Radian WeaponsColor: BlackFinish: Hard AnodizedFabric/Material: AluminumGun Make: GlockGun Model: Glock 45 MOS, Glock 43X MOS, Glock 48 MOS, Glock 47 MOS, Glock 41 MOS, Glock 40 MOS, Glock 35 MOS, Glock 19 MOS, Glock 34 MOS, Glock 17 MOSGun Type: HandgunCountry of Origin: USAFeatures of Radian Weapons Glock MOS Radian EPS Guardian Optic GuardProvides top/front/side impact protection of red dotMounts with stud-lok and tru seal o rings on mounting screw sealing out moistureStealth back-up iron sights