Siren F5 SD
MSRP $115.00
Once the product is available through regional distributors, the retail price will be standardized at $115
Weight 109.3g* Wheel Base 220mm Frame Type Dead Cat Stack Mounting 30x30mm (M2/M3) Cam Support DJI / Walksnail / HDZero/ Analog Motor Mounting 16x16mm (M3) Vtx Mounting 20x20(M2)/ 25.5x25.5(M2) Support Prop Max 5.1inch Standoff Height 20/25mm
*The theoretical value may deviate slightly from the actual value
Carbon Fiber
- Top Plate 2mm x1
- Front Plate 2mm x1
- Rear Plate 2mm x1
- Reinforcement Plate 2mm x1
- Lock Plate 3mm x1
- Arm 5mm x4
Hardware
- M2x23 Countersunk -4/pcs
- M3x6 Flat Head -2/pcs
- M3x6 Button Head -6/pcs
- M3x8 Button Head -20/pcs
- M3x11 Countersunk -4/pcs
- M3x14 Countersunk -8/pcs
- M3x20 7075 Standoff - 6/pcs
- M3x25 7075 Standoff - 2/pcs
- Profiled Spacer 3 - 4/pcs
Accessories
- TPU Cam Shell x1
- TPU Capacitor Mount x1
- TPU Antenna Mount x1
- TPU Action Cam Mount x1
- Rubycon 35v680uF ZLH x2
- ParaCap PCB x1
- M2 Metal Nut x4
- M2 TPU Nut x4
- M3 Rubber Spacer x10
- Damping Tube x1
- Battery Pad x1
- Battery Strap x2
* The TPU antenna mount is configured based on the selected VTX system. The default setup supports antennas using a plastic tube mount. A fully enclosed antenna mount is sold separately.
United States & Canada
- ePacket : $10
- DHL Express : $30
Europe
- ePacket : $10
- DHL Express : $30
Australia & New Zealand
- ePacket : $10
- DHL Express : $30
Other Countries
- ePacket : $15
- DHL Express : $30
Shipping Methods
- ePacket — Economy tracked shipping.
- DHL Express — Fast express delivery with full tracking.
Notes
- Select DHL Express for the fastest delivery. One free extra spare arm is included with each frame.
- Shipping methods available may vary by destination.
- If DHL Express is unavailable for your destination, we may use EMS instead.
- All packages are shipped from Taiwan.
For full shipping terms and details, please see our Shipping Policy .
Siren F5 SD is the newest member of the Siren series. It features our second-generation C-Lock T2 structure, improving durability and reducing resonance while keeping the lightweight character that defines the Siren series. The result is a DC with a completely different character from what you would normally expect. In actual flight, its handling is surprisingly close to the SirenA F5, to the point where you might forget you’re flying a DC at all. That’s exactly what we wanted to achieve.
From the initial design to countless rounds of testing, this project took far longer than we expected. We even had to rely on some key technologies that we can’t share publicly, and the amount of hardware lost during testing was greater than the total losses from all of our previous products combined. We wanted to prove that DC frames are not inherently bad. They simply haven’t been properly developed and refined as a structure.
We don’t know if this frame will be popular, but we do know that we built something different.
Choose options
Clear FPV View
The props and frame stay outside the camera view, keeping the FPV image clean and unobstructed.
DC Geometry. Siren Handling.
Its refined structure brings the responsive, predictable handling of the Siren series to a DeadCat layout.
Cleaner Power Delivery
Dual Low-ESR Capacitor Setup
Two low-ESR capacitors are connected in parallel through a custom QUADMULA PCB. The setup lowers combined ESR, helping reduce voltage spikes and electrical noise under heavy throttle.
*With two identical capacitors connected in parallel, combined ESR is approximately half that of a single unit.
Integrated Protection
Built-In Front Bumper
The Cam Shell combines camera mounting and front protection in one piece. Fewer parts make installation easier and keep the weight lighter.
Complex Engineering, Simple Form
C-Lock T2 Rigid System
The interlocking plate structure holds each arm firmly with a tight, play-free fit. It improves rigidity and durability while reducing unwanted resonance, without adding unnecessary weight.
Maximize your time in the air
Single-Bolt Quick Swap
Our smart design allows for rapid arm replacement by removing just a single bolt. No need to disassemble your stack or disturb your electronics—get back to flying in seconds, not minutes.
HSA Lightweight System
HSA pairs custom YFS M2 stack screws with damping adapter sleeves to support both M2 and M3 mounting holes. It is 60% lighter than standard M3 stack hardware while keeping the stack securely mounted.
Maximum protection tailored to your lens
Dedicated Cam Shell
We provide dedicated Cam Shells for each supported lens, ensuring a precision fit and superior protection. Anchored by our proprietary PS-2 system, the camera is locked mechanically without compressing the TPU. This prevents material deformation, resulting in a fixation significantly more rigid and reliable than direct screw mounting.
Rock-Solid Mounting & Lens Defense
Integrated Action Base
We expanded the mounting geometry to maximize stability and eliminate camera wobble. This robust base integrates a protective design that directly shields your FPV lens from impacts.
Lightweight by Design
Strength Without Extra Weight
The Siren F5 SD keeps frame weight low without giving up the strength required for a 5" build. The weight saved gives you more freedom to choose your camera, battery, and accessories.
Parts & Accessories
Replacement arms, carbon plates, hardware, and TPU parts are available for the Siren F5 SD, covering your repair, maintenance, and build needs.
Optional TPU Accessories
Additional TPU antenna mounts are available for different antenna types and mounting layouts, giving you more flexibility to configure your build.
Official STL Files & 3D Print Support
Pick up the official TPU kit from our store, or download the free STL files and print your own protection on demand.
F A Q
The Siren F5 SD supports DJI O3, DJI O4 Pro, HDZero, Walksnail, and analog video systems.
Select your intended VTX system when ordering. Each option includes the matching Cam Shell, VTX mounting hardware, and a basic tube-style antenna mount.
Switching to a different video system later is simple, only the TPU accessories need to be changed. The carbon frame is identical across all VTX options.
The standard frame kit includes:
- A TPU Cam Shell for the camera, with the matching PS-2 and screws
- A basic TPU antenna mount (tube-style), designed to secure the antenna using the plastic antenna tube
- An Action Camera Mount Base, with the matching PS-3 and screws
The fully enclosed TPU antenna mount shown in some product images is an optional accessory and is sold separately.
Arm Guards are not included in the standard frame kit and must be purchased separately if needed.
PS-2 and PS-3 are QUADMULA’s spacer system, designed to secure TPU accessories more reliably.
They create a proper mounting stop for the screws, preventing the TPU from being crushed or the screws from being left loose due to inconsistent tightening. This ensures that TPU accessories are securely mounted while allowing the screws to be tightened properly.
The standard frame kit includes the PS-2 and PS-3 hardware required for the Cam Shell, Action Camera Mount Base, and Front Bumper.
PS-3 hardware for Arm Guards is not included. If you plan to 3D print and install Arm Guards later, please purchase an additional PS-3 hardware set separately.