Sig Sauer P320 FLUX Raider Legion 9mm Compact, 3.9 in Barrel, 21+1, Tritium Sights, Telescoping Steel Stock, Gray
This P320 FLUX Raider Legion is a factory SIG/FLUX Defense collaboration that pairs the proven P320 9mm system with the FLUX Raider chassis. It features a compact 3.9 in barrel, a telescoping twin‑rod steel stock, tritium night sights, and ambidextrous controls. Two 21‑round magazines and the OEM optic cover plate are included, with a Virtuous Concepts Universal Charging Plate installed.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minor surface scratches and small blemishes are visible on close inspection.
What’s Included
- 2x 21‑round magazines (extended steel magazines for the SIG P320 platform)
- OEM P320 optic cover plate
- SIG Sauer safety/operations manual
- SIG Sauer factory hard case with 320FLUX-9-LEGION label
- Virtuous Concepts Universal Charging Plate (ambidextrous), installed
The FLUX Raider Legion chassis integrates a forward spare‑magazine well (speed load system) and a rear non‑reciprocating Picatinny optic rail, enhancing on‑board capacity and mounting flexibility. The chassis‑mounted ambidextrous manual safety and ambidextrous rear charging handle provide fully bilateral operation.
This Legion‑series configuration retains the compact 3.9 in barrel and striker‑fired P320 fire control group with a skeletonized trigger. It accepts SIG P320 double‑stack 9mm magazines and ships with two 21‑round magazines for a 21+1 capacity.
Sights are tritium night sights with a tritium front and an H3‑marked rear. The pistol/chassis combination includes an integrated accessory rail, and the installed Virtuous Concepts Universal Charging Plate adds an ambidextrous charging interface at the rear.
The gray polymer chassis and gray slide present a cohesive finish, complemented by the telescoping twin‑rod steel stock for a compact, durable layout. This model, mfg part number 320FLUX-9-LEGION, is a recent SIG/FLUX release announced June 25, 2024 and manufactured in the United States.

