First Look: SIG Sauer / Flux Defense P320-Flux Legion

A large format pistol built by a collaboration between SIG Sauer and Flux Defense.

posted on July 2, 2024
SIG SAUER P320-Flux Legion

SIG Sauer has joined forces with Flux Defense to create a factory-built version of the Flux Defense chassis, the SIG/Flux P320-Flux Legion. The P320-Flux Legion is a complete SIG factory build that uses a P320 Fire Control Unit (FCU) with a Legion skeletonized trigger, a full-size Legion Gray slide with integrated compensator housed in the Legion Gray Flux Defense chassis with rapid-deploying stabilizing brace. Build features include XRay3 Day/night sights, an ambidextrous dual-magazine release system, front Picatinny mount, rear non-reciprocating picatinny optic mount, an integrated flared magazine well and ambidextrous safety. The full build ships fully assembled with two 30-round P320 magazines.

“The P320-Flux Legion takes a 9mm handgun, using the SIG Sauer P320 Fire Control Unit, and transforms it into an easily concealed PCC style platform, with the stability of a carbine and loads of Legion upgrades to bring more speed, maneuverability, and control to conceal carry,” said Robby Johnson, Chief Marketing Officer, SIG Sauer, Inc. “This build has a long list of features including a single-finger fast deploying spring brace for rapid deployment, 30-round capacity, an integrated compensator in the custom Legion slide, and a dual-mag release system to get you started. Add to that the endless amounts of customization that can be achieved with the front and rear picatinny mounts and an ambidextrous safety we are sure that the P320-Flux Legion is destined to be a Legion fan favorite.”

The SIG Sauer Legion is an exclusive members-only access program available to owners of the SIG Sauer Legion Series of firearms. Upon registration of any Legion Series firearm, members receive a complimentary case and exclusive access to Legion gear and merchandise from SIG Sauer.

“A collaboration of this scale is an exciting first for us, but given the reputation SIG has for quality, innovation and disrupting the industry, which Flux Defense also shares, this partnership came naturally to everyone,” added Arrius Sorbonne, Flux Defense Co-Owner.

P320-Flux Legion Specifications:

  • Caliber: 9mm
  • Magazine Capacity: 30 rounds
  • Grip Module: Legion Gray Flux Chassis
  • Overall length: 10.9 inches (collapsed)
  • Overall height: 6.1 inches
  • Overall width: 1.6 inches
  • Barrel length: 3.9 inches
  • Sight Radius: 5.9 inches
  • Weight (w/magazine): 49.2 ounces

Visit for more information on the SIG / Flux P320-Flux Legion or other products from SIG Sauer.


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