The Pro Arms 140% Hammer Spring is a direct-fit upgrade for Tokyo Marui G Series pistols, engineered to boost your sidearm’s output and trigger response. Whether you’re running a GBB pistol for backfield defence or practising target shooting at your local site, this spring delivers noticeable improvements in consistency and power.
Key Features
- 140% power rating – increased FPS and muzzle energy over stock springs
- Direct fit for TM G Series – simple installation, no gunsmithing needed
- Enhanced hammer cycling – faster lock-back and improved reliability
- Competition-grade upgrade – trusted by milsim and skirmish players across the UK
Real-World Use Cases
Use this spring if you’re seeking more consistent energy output during longer skirmishes, or if you want to optimise your sidearm for indoor CQB where reliability matters. It’s also popular with target shooters fine-tuning their pistols for consistency at distance.
Technical Specifications
- Brand: Pro Arms
- Spring Rating: 140%
- Compatibility: Tokyo Marui G Series (except G17 Gen 5 MOS)
- Installation: Field-strippable – no specialist tools required
Compatibility & Upgrades
This spring is engineered specifically for TM G Series slide assemblies. Do not attempt to fit it to the G17 Gen 5 MOS, as dimensions differ. Pair it with upgraded hop-up rubbers, inner barrels, or trigger components to build a fully optimised pistol platform.
UK Legal & Site Notes
As a spring component, this upgrade is unrestricted and legal to own and modify in the UK. Check your site chronograph regulations before deployment – increased spring power may push your pistol slightly over local FPS limits depending on your inner barrel and hop setup. Most sites permit tuning within their stated parameters.
Upgrade your TM G Series performance today with Pro Arms’ trusted 140% hammer spring. Order online from Airsoftdirect and get next-working-day delivery across the UK.
| Brand | Pro Arms |
|---|---|
| pa_shooter-configuration | Right Handed |
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