SIG Sauer P320 Full-Size 9mm with Flux Defense Raider X FDE Brace Chassis, 4.7 in Barrel, 21+1 Capacity
This custom-configured SIG Sauer P320 Full-Size pairs the 4.7 in 9mm system with the Flux Defense Raider X brace chassis in FDE. The chassis adds an ambidextrous manual safety, an integrated Speedload spare-magazine carrier, and a telescoping dual-rod rear brace with a push-button release. It includes four SIG-marked factory magazines.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Specific Condition Details: This example shows minor handling wear, and function is excellent.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
What's Included
- SIG Sauer P320 Full-Size 9mm slide, barrel, and FCU installed in Flux Defense Raider X P320 FDE brace chassis
- Flux Defense Raider X P320 brace chassis (FDE), installed
- Four SIG-marked factory magazines: 2x 21-round with tan floorplates and 2x 17-round with black floorplates (all marked Made in Italy)
The Flux Defense Raider X chassis brings a purpose-built layout to the P320 platform. It features an ambidextrous chassis-mounted manual safety and an ambidextrous slide-catch. The integrated Speedload spare-magazine carrier is labeled 'NOT A VFG' and positions a second magazine forward for rapid reloads.
The dual-rod telescoping rear brace is marked 'PISTOL BRACE' and deploys with a push-button release. Overall length is approximately 11 in collapsed and 18 in extended. Assembled weight is about 40 oz, balancing the added stability of the chassis with a compact collapsed profile.
The P320 Full-Size upper uses a 4.7 in carbon-steel barrel and a stainless slide with a Nitron black finish. Sights are a straightforward notch-and-post set. The lower forend includes an M1913 accessory rail for lights or aiming devices.
The FDE glass-filled polymer chassis offers textured grip panels for positive handling. The brace uses black oxide steel rods with a polymer end-cap, and the system retains the striker-fired FCU and core P320 operating characteristics.

