The Flux Defense Raider 365 Ultralight converts a SIG P365 into a lightweight PDW-style platform with a fast-deploy brace and onboard spare magazine. This chassis even comes with a free holster so that you can easily carry it concealed on your body.
A Different Take on the P365
Flux Defense built its reputation on turning pistols into compact PDWs, and the Raider 365 Ultralight is the latest example. The platform starts with the SIG P365, one of the most popular concealed carry pistols on the market.
For their 365 Raider Ultralight, Flux adds a polymer chassis and a deployable brace that changes how the gun handles.
For those who don’t know how it works, at the press a single button, the brace snaps out. The shooter now has a third point of contact. That extra stability helps with control and shot placement. It also changes how far you can realistically push a micro-compact pistol.
The Ultralight version marks a shift from earlier metal designs. Flux moved almost the entire chassis to polymer. Besides small parts, only the slide and barrel remain metal. That change cuts close to four ounces from the system when compared to the aluminum Flux Raider models.
Weight matters here. This setup targets people who actually carry it all day.
Built for Carry, Not Just the Range
Flux designed the Raider 365 Ultralight with carry in mind. The system works with a dedicated holster, which comes in the box. Users can carry it appendix, on-body, or in a bag.
Despite the brace, the profile stays compact. When collapsed, the brace sits flush against the rear of the pistol. Deployment stays quick and simple with a single button.
The chassis also integrates spare magazine storage. A front-mounted release drops the spare mag cleanly. When pressed hard, the empty magazine also drops at the same time. Reloads stay fast and intuitive.
How It Shoots
The brace adds noticeable stability. Recoil feels easier to manage. Follow-up shots come quicker. The platform feels more like a micro PDW than a handgun once deployed.
Controls stay accessible. The system doesn’t interfere with normal pistol operation. The grip angle and shape feels great in the hand. I’d also say that this polymer Raider chassis transfers less recoil to the shooter since it is made of a less rigid material than the aluminum option.
Price and Availability
Flux Defense ships the Raider 365 Ultralight now. MSRP sits at $499.99. That price includes the chassis, brace system, and holster. You can purchase this from the Flux Defense website now.
Raider 365 Ultralight Specifications & Features
- Compatible with SIG P365 platform
- Polymer chassis construction
- available in black of FDE
- Push-button, rapid-deploy brace
- Significant weight reduction over previous models
- Integrated spare magazine storage
- Front-mounted magazine release system
- Includes dedicated holster
- Designed for on-body and off-body carry
- 8.7 ounces
- collapsed dimensions: 9.75″ x 4″ x 1.375″
- extended length of 18.75″
- 13.5″ LOP
- MSRP: $499.99
Important Compatibility Notes
- Do not use short (standard) P365 slides.
- Recommended slides: P365XL, TACOPS or P365 FUSE.
- Works with 17, 21, 25 round P365 magazines.
- Not compatible with 12–15 round magazines.
- Suppressor Clearance – Designed with ample space to accommodate most common pistol suppressors without interference
- Original aluminum R365 holster and magwells are not compatible with the Ultralight
Where It Fits
The Raider 365 Ultralight fills a specific niche. It blends concealed carry with PDW-style control. Flux Defense didn’t build this for everyone. It was built for shooters who want more capability from a gun they already trust.
Learn more about the Raider 365 Ultralight HERE.
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Riley Baxter is a seasoned hunter, outdoorsman, and competitive shooter with deep roots in the backcountry. He has guided professionally for bears, bighorn sheep, and other big game across rugged terrain, bringing firsthand knowledge of what gear actually works in the field. When he’s not chasing game or running drills on the range, Riley is likely in the garage customizing his rifles, pistols, or backcountry kit.
A competitive pistol shooter and lifelong firearms enthusiast, Riley brings both precision and creativity to every piece of equipment he touches. Outside of the gun world, he works as a perfusionist in Montana, a vital role in heart surgery that demands attention to detail, critical thinking, and mental fortitude.
Experience:
– Professional Hunting Guide – Guided for bears, bighorn sheep, and more in some of the West’s toughest country.
– Competitive Shooter – Skilled USPSA pistol shooter with a passion for precision and performance under pressure.
– Custom Builder – Enjoys building and tuning firearms and equipment to meet the exact demands of the hunt or the range.
– Experienced Marksman – Experienced in long-range hunting and precision rifles to meet the demands of the terrain of the West.
– Montana-Based Perfusionist – Medical professional accustomed to making critical decisions in high-stakes environments.