Flux Defense Raider 365 Ultralight – Black PDW Chassis (161-00025)
The Raider 365 Ultralight puts PDW capability on the SIG Sauer P365 without the carry weight of a metal frame. Flux builds this chassis from advanced polymer composite and S7 tool steel with a Type III hard-coat anodized shroud — 8.7 oz of chassis, a spring-loaded brace, and the patented Speedload System. This listing is the Black Ultralight only. Flux part 161-00025, UPC 850080943007.
Light Enough to Carry All Day
Flux designed the Ultralight for IWB, OWB, or off-body carry without becoming a brick. Collapsed footprint is 9.75" × 4" × 1.375"; extended is 18.5" × 4" × 1.25" with a 13.5" length of pull. Flux positions it as about 3" shorter and 85% lighter than an MP5K while still giving you more rounds, control, and velocity than a bare pistol.
Brace, Speedload, and Suppressor Room
- Spring-loaded brace/stock system — collapses for carry, deploys for shooting.
- Patented Speedload System for faster reloads, with up to 50 rounds on the gun using compatible mag extensions.
- Removable shroud included; room for common pistol suppressors (max 1.55" diameter).
- Optional flared magwell and optional 6" barrel for more velocity.
Compatibility
Recommended slides: P365XL, TACOPS, or P365 FUSE. Do not use standard 3.1" P365 slides or the XMACRO Comp / AXG Legion slide. Magazines: 17, 21, and 25 round P365 magazines. Not compatible with 12–15 round magazines. Firearm, slide, barrel, and magazines are not included. An adjustable IWB/OWB holster is included.
Flux Raider 365 Ultralight Black Specifications
| Manufacturer | Flux Defense |
| Model | Raider 365 Ultralight, Black |
| Part Number | 161-00025 |
| UPC | 850080943007 |
| Product Type | PDW chassis / non-serialized accessory (not a firearm) |
| Host Platform | SIG Sauer P365 (FCU) |
| Construction | Advanced polymer composite and S7 tool steel; Type III hard-coat anodized shroud |
| Finish Color | Black |
| Collapsed Dimensions | 9.75" × 4" × 1.375" |
| Extended Dimensions | 18.5" × 4" × 1.25" |
| Weight | 8.7 oz (chassis only) |
| Length of Pull | 13.5" |
| Recommended Slides | P365XL, TACOPS, P365 FUSE |
| Magazine Compatibility | 17, 21, 25 round P365 magazines |
| Suppressor Clearance | Max 1.55" diameter |
| Included | Chassis; removable shroud; adjustable IWB/OWB holster |
Frequently Asked Questions
Is the Ultralight a firearm?
No. Flux lists it as a non-serialized accessory. Your SIG P365 firearm, slide, barrel, and magazines are not included.
Which slides are recommended?
P365XL, TACOPS, or P365 FUSE. Skip standard 3.1" slides and the XMACRO Comp / AXG Legion slide.
What magazines work?
17, 21, and 25 round P365 magazines. 12–15 round magazines are not compatible.
Is a holster included?
Yes — an adjustable IWB/OWB holster ships with the Ultralight.
Internal Reference:
161-00025
Barcode:
850080943007
| Brand: Flux Defense |
| Model: P365 |
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