The ZCI Aluminium CNC Spring Housing Set is a precision-engineered upgrade component designed specifically for Tokyo Marui Hi-Capa 5.1 series airsoft pistols. Whether you’re rebuilding your sidearm after wear or upgrading to improve reliability, this housing delivers the durability and fit quality ZCI is known for.
Key Features
- CNC-machined aluminium construction – consistent tolerances and longevity
- Tokyo Marui Hi-Capa 5.1 compatible – direct fit, no modification required
- Upgrade or replacement option – extend your pistol’s service life
- Lightweight yet robust – maintains ergonomic balance
- Professional finish – anodised for corrosion resistance
Real-World Use Cases
Ideal for Hi-Capa shooters who’ve worn out original parts through heavy skirmish use or prefer stronger aftermarket internals. Works perfectly for those building a custom performance pistol or restoring a neglected sidearm. Popular with target shooters and MilSim players who rely on secondary weapons.
Technical Specifications
- Brand: ZCI
- Material: Aluminium (CNC-machined)
- Platform: Tokyo Marui Hi-Capa 5.1
- Finish: Anodised
Compatibility & Upgrades
This spring housing integrates seamlessly into Tokyo Marui Hi-Capa 5.1 platforms. Pairs well with other ZCI internal components or genuine Tokyo Marui parts for customised builds. Consider upgrading the entire nozzle assembly or trigger group for comprehensive performance gains.
UK Legal & Site Notes
As a replacement/upgrade component, this housing falls outside legal restrictions. Always confirm compatibility with your specific Hi-Capa variant before purchase. Check your local skirmish site’s technical rules if running a heavily modified pistol.
Invest in proven ZCI quality and keep your Hi-Capa 5.1 running smoothly. Stock parts wear; precision upgrades last. Order your spring housing from Airsoftdirect UK today.











