The EPES CNC Duralumin H+PTFE Double O-Ring Nozzle (21.3mm) is a precision upgrade component designed to improve air seal, consistency, and durability in AEG gearboxes. Whether you’re fine-tuning a skirmish rifle or building a competition-ready platform, this nozzle delivers measurable performance gains over factory plastic alternatives.
Key Features
- CNC-machined duralumin construction – rigid, lightweight, and corrosion-resistant
- H+PTFE coating – reduces friction and wear during operation
- Double O-ring design – enhanced air seal and consistency shot-to-shot
- 21.3mm bore – compatibility with most Version 2 gearbox platforms
- Direct replacement – no modification to existing gearbox required
Real-World Use Cases
This nozzle excels in precision-focused builds: DMR platforms requiring tight shot grouping, polarised CQB setups where consistency matters, and general tune-ups seeking a plug-and-play FPS stability improvement. The dual O-ring system is particularly valued in higher-ROF builds, where air pressure consistency prevents velocity creep.
Technical Specifications
- Material: CNC-machined duralumin with H+PTFE coating
- Bore diameter: 21.3mm
- O-ring configuration: Double O-ring
- Gearbox compatibility: Version 2 (and compatible variants)
- Finish: Anodised duralumin with PTFE treatment
Compatibility & Upgrades
The 21.3mm bore fits standard Version 2 AEG gearboxes. This component pairs well with upgraded air nozzles, tightbore barrels, and hop-up units as part of a wider tuning programme. Always confirm your gearbox version and nozzle bore size before ordering.
UK Legal & Site Notes
This is an internal upgrade component and carries no legal restrictions in the UK. Site chronographs should be re-checked after installation, as improved air seal may slightly elevate FPS. Always test your build before match day.
Order the EPES CNC Duralumin H+PTFE Nozzle 21.3mm from Airsoftdirect UK and experience tighter air seal, improved consistency, and reliable durability in your tuned platform.









