FLUX Redux Turns Gen 4 and 5 Glocks Into PDWs for $349.99
FLUX Defense has released the Redux, a revised chassis that converts eight Gen 4 and Gen 5 Glock pistols into personal defense weapon configurations. The MSRP is $349.99. Compatible models include the G17, G17L, G19X, G22, G34, G35, G46, and G47. FLUX launched its first Glock chassis eight years ago and built the Redux on what it learned from that design. The system keeps a modular, two-piece frame, a spring-loaded brace that deploys fast, and a Railmag forend that carries a spare magazine. Gun Digest published the first look on November 9, 2026.
Key Details
The Redux is a material and fit upgrade, not a new concept. FLUX changed the interface between chassis and host pistol to tighten the connection. It also reworked the ergonomics and the magazine release. Key specifics:
- MSRP: $349.99
- Compatible Glocks: G17, G17L, G19X, G22, G34, G35, G46, G47 (Gen 4 and Gen 5 only)
- Shroud: New aluminum shroud accepts ported or compensated barrels and adds ambidextrous thumb ledges. Shroud can be removed entirely for suppressed use.
- Brace: Every Redux ships with a pistol brace.
- SBR conversion: FLUX sells a separate SBR Stock Kit to convert the brace into a stock.
- Forend: Railmag forend holds one spare magazine.
FLUX described the project as a return to the original design, rebuilt around every interface and material in the first system. That framing signals the Redux is an iteration on a proven platform, not a clean redesign.
Background
Chassis systems like this one emerged as a way to turn a handgun into a compact carbine-style platform. Owners get a stabilized shoulder interface, a longer sight radius with the right setup, and a spare magazine on the support hand. FLUX has been one of the most recognized names in this niche since its first Glock chassis arrived eight years ago.
The legal side matters more than the hardware. Federal law treats a rifle with a barrel under 16 inches as a short-barreled rifle under the National Firearms Act. Making or possessing one without approval requires a $200 transfer tax and ATF registration on the appropriate form, and building one without that paperwork is a federal felony. Pistol braces became a flashpoint when ATF's 2023 rule attempted to redefine many braced pistols as SBRs overnight. Courts have since struck down that rule, but the underlying NFA definitions still control how a stock or brace can be used on a short barrel.
Why It Matters for Gun Owners
Anyone running a Gen 4 or Gen 5 Glock in the listed models is the direct audience. Owners of G17s, G19Xs, and G47s should check whether their current pistol barrel, optic, and magazine well match the Redux interface before buying. The shroud change matters for owners running compensated barrels, because the new design accepts them without the workaround common on earlier chassis systems.
The SBR kit is where owners get into trouble. A braced pistol on a Redux is legal as a pistol only in its as-shipped configuration. Attaching the SBR Stock Kit and running a stock on a short barrel changes the firearm's legal status. Buyers need to file for the proper tax stamp or keep the configuration pistol-legal. Suppressor owners should confirm the shroud removal does not change the barrel length, because length is what the NFA measures.
Check your state's rules too. Several states restrict SBRs, pistol-stabilizing braces, or both. A federal-legal build can still violate state law, so look up local statutes before ordering the kit.
DownRange Analysis
Under Bruen, the Second Amendment protects arms in common use, and Glock pistols sit squarely in that category. The constitutional question is not the chassis. It is the NFA's short-barreled rifle definition, which courts have upheld for decades. Expect challengers to point at the brace-and-stock ecosystem as evidence that the regulatory line is arbitrary, but expect the NFA framework to survive as long as it governs the barrel length.
For the market, $349.99 places the Redux in the mid-tier of chassis systems. The aluminum shroud and ambidextrous ledges are the features that will move buyers who already own a compensated Glock. Watch for after-market shroud and forend options as competitors respond.
Right now, the practical move is simple. If you own a compatible Glock, verify your model and generation, read the NFA rules on barrel length before you buy any stock kit, and keep your firearm in its legal configuration until your paperwork is in order.
