Radian Weapons Guardian Optic Guard Features The Radian Weapons Guardian Optic Guard uses a STUD-LOK threaded stud and nut mounting interface which Radian describes as the most secure mounting system on the market. That interface provides much longer thread engagement and greater hold down power than a typical screw-only mount along with increased shear resistance under impact. The shield surrounding the optic delivers top front and side protection guarding the Holosun 507C against drops strikes and holster wear. Optional back-up sights can be added for an unobstructed iron sight picture forward of the optic. Machined from 7075 aluminum and hard anodized in Black the Guardian is built to handle the rigors of duty and competition use on a Glock MOS slide. Radian s TRU-SEAL design eliminates the need for an added sealing plate since pre-installed O-rings on the mounting screws keep the plate watertight against the slide. That seal keeps moisture out and helps prevent corrosion from forming in the mounting threads over time. Mounting hardware is included making the Guardian Optic Guard a complete ready-to-install protection system for a Holosun 507C equipped Glock MOS pistol. Radian Weapons Guardian Optic Guard Specifications Manufacturer: Radian Weapons Model: Guardian Optic Guard Material: Aluminum Color: Black Finish: Anodized Compatible Hosts: Glock MOS Holosun 507C Includes: Mounting Hardware Weight: 1.04 lbs Available At: GrabAGun