SIG Sauer P320-FLUX Legion 9mm Compact, 3.9 in Compensated Legion Slide, Flux Raider Chassis, Optics-Ready, Day/Night Front Sight, 30+1, Four Magazines
The factory SIG/Flux P320-FLUX Legion pairs a 3.9 in compensated Legion slide with the Flux Raider chassis in Legion Gray, delivering a compact 9mm setup with smart mounting options and rapid-deploy brace. It comes optics-ready with a cover plate installed, includes a day/night front sight, and ships with two 30-round and two 21-round magazines. Dimensions, controls, and features are purpose-built, including a rear non-reciprocating Picatinny optic mount, dual side front accessory rails, and the Legion FCU with a skeletonized trigger.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore 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 present.
What’s Included
- 2x 30-round magazines
- 2x 21-round magazines
- SIG Sauer factory hard case
- Owner's manual
- Lock
This P320-FLUX Legion is a factory SIG/Flux collaboration built around the Legion series Fire Control Unit with a skeletonized trigger and ambidextrous controls. The compact setup uses a 3.9 in compensated Legion slide finished in Legion Gray with front and rear serrations and the Legion chevron emblem.
The Flux Raider chassis integrates a spring-assisted, telescoping stabilizing brace designed for one-finger rapid deployment. The chassis also incorporates backup iron sights in the brace housing and an integrated spare-mag Speedload System with a dedicated BOTH MAGS control, alongside a dual‑mag release system.
Mounting options are extensive: the slide is optics-ready with a cover plate installed, while a rear non-reciprocating Picatinny optic mount and dual side front Picatinny accessory rails are built in. A day/night front sight provides a bright front dot, and the sight radius measures 5.9 inches.
Capacity is listed at 30+1, and the package includes two 30-round and two 21-round magazines to support that configuration. Overall length is 10.9 in (collapsed), height 6.1 in, width 1.6 in, and weight 49.2 oz with magazine. The factory case label matches the FCU serial. Made in the USA.