Over eight years ago, FLUX Defense set out to redefine what a Glock could do with the original Glock Flux Brace, transforming a standard pistol into a more configurable platform. Since then, the company has continued developing the concept, working to address limitations of the original design while retaining its modular approach.
Now, FLUX Defense is bringing that platform back online with the Redux. The updated chassis retains the original two-piece design while introducing changes to its materials, fitment, ergonomics, deployment mechanism, and magazine release.
What We Need to Know
The Redux is an evolution of FLUX Defense’s original Glock chassis, with modularity remaining central to its design. One of the more notable changes is the ability to use the brace or stock configuration without the RailMag attachment.
That gives users greater flexibility in how they configure the system, including those who may be restricted from using integrated spare-magazine configurations under applicable state laws. FLUX specifically identifies New York, New Jersey, and Washington as examples, although the legality of a particular configuration will depend on the applicable laws and the firearm’s overall configuration.
The Redux is compatible with the following Gen 4 and Gen 5 Glock models: 17L, 34, 35, 17, 22, 31, 47, 19X, 45
Improvements Over the Original FLUX Brace
Updated Materials
Nearly a decade after introducing its original 3D-printed Glock chassis, FLUX Defense has revisited the platform with the Redux. The updated design uses an injection-molded composite polymer also found in the company’s Raider X, a material FLUX says was developed as an alternative to metal components in engine applications.
The move to injection molding represents a change in how the chassis is manufactured. FLUX’s stated goal is to improve consistency and fitment, though the material’s long-term performance will ultimately need to be evaluated through use.
Improved Fitment and Tighter Tolerances
FLUX Defense has also focused on improving the fit between the chassis and Glock frame. The company says it redesigned several areas of the system to create a deeper, tighter fit.
Reduced Movement Between the Backstrap and Chassis: The original design’s housing fit over the Glock’s backstrap, which could leave small gaps between the components. FLUX says the redesigned mounting tracks are intended to reduce movement between the chassis and frame.
Higher Beavertail Wrap: The Redux features a redesigned beavertail that sits higher and deeper against the rear of the Glock frame. According to FLUX, the updated geometry is intended to help limit vertical movement under recoil.
More Consistent Manufacturing: FLUX says the original brace could experience minor fitment inconsistencies as its material cooled and shrank during manufacturing. The Redux’s composite polymer and injection-molding process are intended to provide more consistent dimensions, including around the frame pin.
These changes address several areas FLUX has identified as limitations of the original design. Whether they translate into a more consistent fit across production units remains to be seen.
Refined Spring-Loaded Deployment
The Redux features a spring-loaded deployment mechanism designed for one-handed operation. FLUX says the updated system is intended to make extending the brace quicker and smoother.
The company has also redesigned the internal tracks and locking surfaces within the brace arms to address the rattling that could occur when the original system was fully extended.
New Aluminum Shroud and Thumb Ledges
The Redux introduces an aluminum shroud designed to accommodate ported and compensated pistols while providing clearance for suppressors.
The shroud also incorporates ambidextrous thumb ledges, adding another point of contact. FLUX says the updated geometry is intended to improve ergonomics and control.
Updated RailMag Release
FLUX has replaced the original RailMag’s friction-fit release with a button-operated mechanism.
The updated design is intended to make magazine removal more convenient, although its real-world performance will depend on how the mechanism holds up to repeated use.
Who Is This For?
The Redux is designed for users interested in a configurable Glock-based platform. FLUX identifies several potential applications, including:
Law Enforcement and Military: Potential applications include vehicle operations, K9 operations, and shield work.
Home and Personal Protection: The system may appeal to consumers interested in a configurable home-defense setup or a compact platform for personal protection.
Protection Services: Executive protection and church security are among the applications FLUX identifies for users seeking a configurable platform.
These are potential applications rather than established performance advantages. The Redux’s suitability for any particular role will depend on its configuration, the user’s requirements, and applicable laws and policies.
Price and Availability
MSRP: $349
Availability: Available now through the FLUX Defense website.
The Bottom Line
The Redux represents a substantial update to FLUX Defense’s original Glock chassis, with changes aimed at addressing several of the first-generation design’s fitment, material, and ergonomic limitations. The ability to use the system without the RailMag attachment also gives users more configuration flexibility.
At $349, the Redux offers a revised take on a platform FLUX has spent years developing. The changes are notable, but whether they deliver a meaningful improvement over the original will ultimately come down to fitment consistency, reliability, and long-term performance.
For now, the Redux appears to be more than a cosmetic refresh. FLUX has reworked several aspects of the original design, and the next step is seeing how those changes hold up outside the manufacturer’s claims.