Flux Raider

Raider X: The P320 PDW Chassis

The Raider X accepts any Sig P320 fire control unit and compatible slide (full-size, compact, or carry length), converting it into a braced PDW that folds down to roughly the footprint of a large pistol. The chassis adds a folding stabilizing brace that deploys in under a second, an integrated Picatinny top rail for optics mounting, a flared magazine well for faster reloads, and improved grip ergonomics. It uses standard P320 magazines including extended 21-round and 30-round options. Available in black, Flat Dark Earth, and Ranger Green.

Raider 365: Micro-Compact PDW

The Raider 365 applies the same concept to Sig’s micro-compact P365 platform. Available in standard aluminum and ultralight polymer construction, with a standalone magwell accessory for enhanced reload speed. The 365 chassis is the smallest Raider — genuinely pocketable when the brace is folded, using standard P365 magazines including extended 17-round and 21-round options.

Sig Sauer P320-FLUX and P365-FLUX Factory Pistols

For buyers who want a complete, ready-to-fire package rather than a chassis conversion, Sig Sauer sells factory P320-FLUX Legion, P320-FLUX TACOPS, and P365-FLUX pistols that integrate the Flux chassis design with Sig’s own fire control units, barrels, slides, and factory-mounted Romeo-X optics. These ship complete with no assembly required — the Sig factory FLUX pistols are the fastest path to a braced PDW platform.

Why a PDW Chassis?

The appeal is a pistol that gains rifle-like stability in under a second: fold out the brace, shoulder it, and you have a platform that’s dramatically more accurate and controllable at 25–75 yards than a handheld pistol. For home defense, vehicle carry, and personal protection where a full carbine is too large, the Raider bridges the gap between pistol and rifle capability in a package that stores in a laptop bag.

Aftermarket Chassis vs. Factory Complete: Which to Buy

If you already own a P320 or P365, the Raider X or Raider 365 chassis lets you convert what you have — no FFL transfer, no new serial number, just install your existing fire control unit and slide. If you’re starting from scratch, the Sig factory P320-FLUX or P365-FLUX ships complete and ready to fire with a factory warranty covering the entire package.

Legal Status

Both Flux Raider chassis builds and Sig factory FLUX pistols with stabilizing braces are classified as pistols under federal law — standard background check, no NFA registration required. State laws vary on braced pistols — check your state’s regulations.

Frequently Asked Questions

Is the Flux Raider legal?
Yes — with a stabilizing brace, it’s classified as a pistol federally. Check state laws for brace-specific restrictions.

Can I use my existing P320 in a Raider X?
Yes — the Raider X accepts P320 fire control units with full-size, compact, and carry slide lengths.

Raider X vs. Raider 365?
Raider X fits the larger P320 platform (up to 30-round mags). Raider 365 fits the smaller P365 platform (up to 21-round mags) and is more compact.

Flux Raider vs. Micro Roni?
The Raider is purpose-built for Sig platforms with a much more compact folding design. The Micro Roni is a bulkier chassis for Glock pistols. Different platforms, different size classes.

What magazines does it use?
Standard Sig P320 or P365 magazines depending on chassis, including all extended-capacity options.

See Also: Flux Defense • Sig P320 • Sig P365 • Pistol-Caliber Carbines • AR-15 Pistols