Radian’s Guardian & Guardian + Six Adds Support For Top Holosun & Trijicon Optics
Radian Weapons has long set the standard when it comes to premium firearm components, earning a reputation for blending precision engineering with forward-thinking design. While the company built its name on AR-15 platforms, it’s no secret that Radian’s innovations have steadily branched into the handgun world—delivering purpose-built upgrades for Glock and SIG pistols. Now, that same standard of excellence comes to some of the most popular pistol optics on the market. The Guardian and Guardian + SIX mounting systems are officially available for Holosun and Trijicon red dots.
Engineered for Serious End Users
The Guardian isn’t just the strongest mounting platform in the game—it redefines what “secure” actually means. Unlike standard mounting plates that rely on clumsy sealing plates or loose tolerances, the Guardian uses TRU-SEAL technology to eliminate the need for extras. Dual O-rings on the mounting screws create a watertight seal that blocks moisture, protects threads from corrosion, and ensures your optic stays bone-dry no matter what you throw at it.
Pair that with STUD-LOK, Radian’s proprietary threaded stud-and-nut interface, and you’ve got a system that delivers unmatched thread engagement and hold-down power. More surface contact. More shear resistance. Fewer failures. It’s a solution designed for shooters who demand absolute dependability in their equipment.
Add SIX: When Your Red Dot Fails, It Won’t Be Game Over

While the Guardian locks your optic in with a vault-like grip, the Guardian + SIX model goes one step further. Radian’s integrated SIX backup iron sights lie flush within the mount, giving you a clean and modern low-profile aesthetic with a true ultra-low co-witness. They’re there when you need them and invisible when you don’t—springing into action only when your red dot doesn’t.
With features like anti-glare serrations, snag-free design, and fast target acquisition, the SIX system brings peace of mind without compromising your pistol’s sleek profile. If you’ve ever had an optic go down at the wrong time, you already understand how critical that can be.
Full Compatibility with Leading Optic Platforms

Radian’s expanded lineup now supports a broad range of optics in the Trijicon and Holosun family. Guardian and Guardian + SIX models are available for:
• MOS / Trijicon RMR
• MOS / Trijicon RCR
• MOS / Holosun EPS
• MOS / Holosun 407C-507C
• MOS / Holosun 507 COMP
Whether you’re running a compact CCW setup or a full-size duty pistol, there’s now a Guardian that fits.
Built to Perform, Priced for Serious Shooters
Precision doesn’t come cheap—but it doesn’t have to break the bank either. The standard Guardian optic mount is available for $129.95, offering top-tier sealing and strength for those who already have a preferred BUIS solution. If you’re looking to go all-in on redundancy and performance, the Guardian + SIX package comes in at $184.95—a small price to pay for the assurance that you’ll never be left in the dark when it matters most.