Important
Official STL Files: The 3D models for the Firestar platform will be available soon on the official Polarstar Airsoft website. Stay tuned to our Discord community for the official release announcement!
Created by: @ClutchFire3D
This project is licensed under CC BY-NC-ND 4.0. Commercial use, redistribution, or sale of STL files and printed parts is strictly prohibited.
- 1. Meet Firestar
- 2. Recommended Print Settings
- 3. Support the Mission
- Step 1: Lower Receiver Preparation
- Step 2: Upper Receiver & Handguard
- Step 3: Trigger Housing & HPA
- Step 4: Stock Adapter
- Step 5: Final System Assembly
- Step 6: Stock
Forget Gearboxes. Embrace Innovation.
The Firestar was developed by ClutchFire3D leveraging PolarStar Airsoft technology. Designed from the ground up to extract maximum performance from the F2™ and Jack™ HPA engines, this platform eliminates the limitations of adapted AEG bodies.
To ensure the structural integrity of your Firestar, follow these guidelines:
| Parameter | Recommended Setting |
|---|---|
| Material | ASA or ABS (Required for impact resistance and durability) |
| Wall Line Count | 4 layers (Crucial for thread and insert strength) |
| Infill Density | 50% or higher |
| Support | Required (Tree supports recommended for cleaner surfaces) |
| Layer Height | 0.12mm |
⚠️ Warning: Do not use standard PLA for structural parts, as it may become brittle or warp under heat and mechanical stress.
The Firestar is an open-source project. If you find this project valuable, please consider supporting our work.
Install the trigger blade. Note the specific slot to prevent the selector from over-rotating. Secure with an M3 screw.
Using a soldering iron, install the M3 brass inserts into the Pistol Grip mounting holes.
Bolt the Pistol Grip to the body using M3 screws.
| View 1 | View 2 |
|---|---|
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Install M3 inserts into both sides of the Upper Receiver and the Outer Barrel.
Screw the 14mm CCW adapter onto the Outer Barrel tip.
Align the Outer Barrel holes with the Handguard. Pay attention to the chamfered side.
| Hole Alignment | Screw Tightening |
|---|---|
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Slide the Upper into the Handguard and secure both sides with M3 screws.
| Fitting | Hole Alignment |
|---|---|
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Slide the assembled Hopup and inner barrel into the Upper until it hits the internal limiter.
| Polarstar Hopup Thing | Maxx Model View |
|---|---|
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Fix the F2 trigger board to the left side of the Housing using the original small screw.
| Trigger Housing L | Board |
|---|---|
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Place the trigger blade in its housing, close it with the right side, and secure with M3 screws.
| Trigger Blade | Housing Closing |
|---|---|
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Snap the Selector Plate into place.
Place the M5 nut inside the specific slot within the Lower Receiver.
Install the Stock Adapter before the HPA system and secure it with the M5 screw.
Route the FCU wires through the Stock Adapter and the air line through the Pistol Grip hole.
Slide the Trigger Housing into the Lower and lock it with the Lower Pin.
Slide the F2 engine into the Upper until it seats into the Hopup.
Install the F2 Lock to prevent the engine from moving during shots.
Join the Upper and Lower receivers and lock with the front pin.
Install the printed (or aftermarket M4) Mag Release with the spring. Ensure smooth movement.
Cut the carbon fiber tube to length and drill the mounting holes.
Install M3 inserts into the printed Stock part and bolt it to the tube.
Connect the FCU and battery, tuck the wires into the tube, and slide it onto the Adapter.
| Connection | Stock Fitting |
|---|---|
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Share your Firestar build on Instagram and tag @ClutchFire3D.
Join our Discord | Support the Project
