Radian Weapons, Guardian, Holosun EPS Optic Guard Mount, Fits MOS Glock, Anodized Finish, Black, Includes Stealth Back Up Iron Sights NEW Optic Mounting Plate with Protective Shield Fits M.O.S. Glock with Holosun EPS Includes Proprietary STEALTH Back Up Iron Sights Product Description The Radian GUARDIAN Optic Mounting System provides unprecedented protection for your pistol red dot optic. Machined from 7075 aluminum & hard anodized, the design provides top/ front/side impact protection. Optional back-up sights, provide an unobstructed, irons forward sight picture. The STUD-LOK threaded stud/nut mounting interface is the most secure system on the market. This 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.