Storm HP-R HPA System – V2 Gearbox

The Storm HP-R HPA system is a compact electro-pneumatic engine designed exclusively for Version-2 rear-wired gearboxes. This HPA system replaces traditional AEG internals with a fully regulated solution, delivering rock-solid shot-to-shot consistency and near-instant trigger response—making it the go-to choice for competitive players, advanced tuners, and anyone seeking the ultimate in reliability and performance on the skirmish field.

Key Features

• Electro-pneumatic engine – regulated HPA delivery ensures rock-solid shot-to-shot consistency, eliminating velocity fluctuations inherent to spring-driven AEGs.
• V2 gearbox compatibility – engineered specifically for rear-wired Version-2 gearboxes, making integration straightforward for experienced builders.
• Near-instant trigger response – HPA actuation delivers crisp, responsive trigger feel compared to traditional AEG gearbox delay.
• Compact design – optimised footprint allows integration into a wide range of receiver types without bulky external lines.
• Advanced tuner-friendly – designed for players who understand air systems and seek fine-grained velocity and performance tuning.

Real-World Use Cases

• Competitive milsim and skirmish – the consistency and trigger response of the Storm HP-R suit players competing in high-intensity UK woodland and urban skirmish events, where shot-to-shot reliability directly impacts field performance.
• UK site compliance – HPA systems allow precise velocity tuning to match your site’s FPS and joule limits (commonly 328 FPS for rifles on 0.20 g BBs, or site-specific thresholds). Confirm your venue’s requirements before deployment.
• Advanced technician builds – ideal for tuners and experienced players undertaking full gearbox rebuilds or custom platform conversions who value repeatability and minimal maintenance.

Technical Specifications

• Product Type: Electro-pneumatic HPA engine
• Gearbox Compatibility: Version-2 (V2) rear-wired
• Design: Compact, regulated system

Compatibility & Upgrades

The Storm HP-R is purpose-built for V2 rear-wired gearboxes. Installation requires competent gearbox knowledge and access to appropriate air supply solutions. Consult the manufacturer’s manual for precise installation steps, recommended air pressure settings, and compatible air tanks or batteries. This system pairs well with high-quality 0.25 g or 0.28 g BBs to optimise consistency at your site’s engagement distances.

UK Legal & Site Notes

The Storm HP-R is a component, not a complete RIF. If you are integrating this HPA system into a rifle receiver, the final assembled weapon may constitute a Realistic Imitation Firearm (RIF) under UK law and will require UKARA membership or a relevant VCRA defence for legal purchase and use. Always check your skirmish site’s specific FPS and joule limits before use; HPA systems allow precise velocity matching to site rules. Players aged 18+ only.

What’s in the Box

Storm HP-R electro-pneumatic engine unit (component). Consult the manufacturer’s documentation for included fittings, o-rings, or mounting hardware.

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