Radian Weapons Guardian+Six Optic Guard & Back-Up Iron Sights - Glock MOS / Trijicon RCR - Black

The Radian Guardian+Six is a heavy-duty optic guard and co-witness sight package, purpose-built for Glock MOS pistols set up for the Trijicon RCR reflex footprint. The "Six" in the name refers to Radian's matching SIX Back-Up Iron Sights, which are included in the box to give the user a fully redundant aiming system straight out of the package.

The Guardian itself is an optic mounting plate wrapped in an integrated protective shroud. It is machined from 7075 aluminum and finished in Type III hard anodized black, giving it excellent wear resistance in a low-profile package. The shroud wraps around the optic body to shield it from impact and debris, while its anti-glare serrations break up incoming reflections and the rounded shape keeps the slide snag-free during the draw.

Paired with the guard, the SIX BUS provides an ultra-low co-witness through the mounted optic, so the shooter can run the red dot as the primary aiming solution while keeping fully functional iron sights on standby if the electronic optic fails. The package is built around Glock's MOS slide interface for direct installation.

The mount uses Radian's STUD-LOK interface, which drives the included mounting studs deeper into the slide for greater thread engagement and improved shear strength over standard optic screws. The integrated TRU-SEAL system uses O-rings at the plate-to-slide interface to seal out debris and moisture, eliminating the need for a separate sealing plate. Together, these features make the Guardian one of the most robust optic mounting solutions available for a defensive handgun.

Designed specifically for slides cut for the Trijicon RCR closed-emitter reflex footprint, the Guardian+Six ships with the optic guard, the SIX back-up iron sights, and all mounting hardware required for installation on a Glock MOS pistol slide.