SIG SAUER P320 FLUX LEGION 9mm 3.9in 2x30RD
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About this product
The SIG SAUER P320 FLUX Legion 9mm 3.9in 2x30rd is a modular pistol that blends the handling of a handgun with the stability of a carbine platform. It comes on a Legion Gray Flux chassis with an integrated compensator and a non-reciprocating Picatinny optic mount. This package includes two 30-round magazines, X-Ray3 day/night sights, and a manual safety.
| Manufacturer | SIG SAUER |
|---|---|
| Model | P320 FLUX Legion |
| Material | Stainless steel slide, polymer grip module (per manufacturer specs) |
| Compatibility | P320 magazines (17, 21, 30 round) |
| Finish | Legion Gray Cerakote |
| Weight | Approximately 2.5 lbs (empty, without magazine) |
| Condition | New |
Key Features
- Flux Chassis: Gives you a stable, carbine-like shooting platform while keeping the compact size of a pistol — that means better accuracy at distance without losing close-quarters speed.
- Integrated Compensator: Reduces muzzle rise and felt recoil, so follow-up shots stay on target faster. Per SIG SAUER specs, it cuts muzzle climb by about 30%.
- Non-Reciprocating Picatinny Optic Mount: Your red dot stays rock-solid even as the slide cycles — no jiggling, no lost zero.
- X-Ray3 Day/Night Sights: Tritium inserts and a bright front ring let you shoot in any light without batteries. They co-witness with most micro red dots.
- Two 30-Round Magazines Included: You get serious firepower right out of the box — no need to hunt down extra mags.
Who It's For
This one is for the shooter who wants the stability and capacity of a PCC but the compact carry feel of a pistol. It's a solid choice for home defense, range fun, or competition shooters who run in pistol divisions that allow chassis systems. New gun owners who want a do-it-all platform will appreciate the modularity — you can swap grip modules, barrels, and calibers down the road.
Pros & Cons
- Pros: Carbine-like accuracy with pistol maneuverability; integrated comp reduces recoil; two 30-round mags included; optic-ready without losing irons; manual safety for extra control.
- Cons: The chassis adds some width compared to a standard P320, so it may not fit all holsters designed for the standard pistol. Also, the compensator means you'll want to avoid shooting from a retention holster — it's more of a range/competition/home defense setup.
Comparison
| Feature | SIG SAUER P320 FLUX Legion | Zev Technologies OZ9 | Agency Arms AOS G19 |
|---|---|---|---|
| Caliber | 9mm Luger | 9mm Luger | 9mm Luger |
| Barrel Length | 3.9 inches | 4.0 inches | 4.02 inches |
| Capacity (standard) | 30 rounds (included) | 17 rounds (included) | 15 rounds (included) |
| Chassis | Flux Legion (integrated comp) | Zev modular grip | None (standard frame) |
| Optic Mount | Non-reciprocating Picatinny | Direct mill (reciprocating) | Direct mill (reciprocating) |
| MSRP | $1,525.22 | ~$1,800 | ~$1,600 |
FAQ
Does the SIG SAUER P320 FLUX Legion come with a case?
Yes, it ships in a SIG SAUER hard case with the pistol, two 30-round magazines, cable lock, and manual.
Can I use standard P320 holsters with this chassis?
Most standard P320 holsters won't fit due to the Flux chassis width and the integrated compensator. Look for holsters specifically designed for the Flux Legion or open-bottom competition holsters.
Is the compensator removable?
According to SIG SAUER specs, the compensator is an integrated part of the Flux chassis — it's not meant to be removed. If you want a non-comped setup, you'd need a different barrel and chassis combination.
What optic footprint does the mount use?
The non-reciprocating Picatinny mount uses a standard Picatinny rail section, so you can mount any optic that fits a Picatinny base (like Aimpoint ACRO, Trijicon RMR with adapter, etc.). It does not use the standard P320 slide cut.
Why Buy From Us
- ✓ Nationwide delivery (all 50 states)
- ✓ Ships 1-2 business days
- ✓ 30-day returns
- ✓ Secure checkout
Last updated: April 2026
Related categories: Semi Auto Handguns | SIG SAUER | Pistol Chassis Systems