Flux Defense Raider 365 Ultralight Pistol Chassis – Black

The Flux Defense Raider 365 Ultralight pistol chassis (brand part no. 161-00025) turns a Sig Sauer P365 into a compact braced platform without adding bulk to the grip. Machined from aircraft aluminum and finished in black, it’s built for shooters who want the control of a two-handed brace on a pistol they can still carry concealed. This chassis is a favorite for home defense and range use where a stabilized, fast-handling PDW-style setup matters. It replaces the factory P365 grip module entirely, giving the pistol a rigid aluminum foundation instead of polymer.

Key Specifications

• Precision-machined from aircraft aluminum, keeping the chassis light without sacrificing rigidity.
• Finished in hard-coat black anodizing with black nitrided hardware for corrosion resistance in humid or wet environments.
• Built specifically for the Sig Sauer P365 platform, compatible with P365XL, TACOPS, and FUSE slide assemblies.
• Accepts 17 to 21-round P365 magazines; it is not compatible with the shorter 12 to 15-round factory magazines.
• Includes a spring-loaded folding side arm that deploys the brace fully with a single button press for one-handed operation.
• Features integrated dual-magazine storage on the chassis body with its own dedicated release button.

Frequently Asked Questions

Will this fit my Sig P365? It’s designed around the P365XL, TACOPS, and FUSE slide assemblies, so confirm your slide matches before ordering.

What magazines work with it? The chassis is built around 17 to 21-round P365 magazines and will not run the factory 12 to 15-round flush-fit mags.

Does the brace deploy automatically? Yes, the spring-loaded folding arm extends the brace to the ready position with one press of its release button.

Buy the Flux Defense Raider 365 Ultralight Pistol Chassis

Ready to give your P365 a rigid aluminum foundation and a brace that deploys in an instant? Order the Flux Defense Raider 365 Ultralight from our pistol grips lineup, and our Lubbock, Texas team can help confirm fitment before it ships.