Cow Cow TM G-Series 140% Hammer Spring – High Strength Steel

The CowCow 140% Hammer Spring is a direct upgrade for Tokyo Marui G Series airsoft pistols, designed to increase trigger response and blowback intensity without sacrificing reliability. Built from premium high-strength spring steel with a hard-coat finish, this component delivers noticeably snappier action and improved kick impulse—ideal for players seeking a more authentic gas blowback experience.

Key Features

• 140% spring strength – measurably increased blowback kick versus OEM TM springs
• High-strength spring steel construction – durable and engineered to handle sustained fire
• Hard-coat corrosion resistance – extends component lifespan in UK outdoor and indoor sites
• Direct fit TM G Series – compatible with standard Tokyo Marui Glock models
• Enhanced trigger response – faster hammer reset for rapid follow-up shots

Real-World Use Cases

Target shooters and pistol specialists benefit most from this upgrade. The increased spring tension sharpens trigger feel and improves shot-to-shot consistency at range. For milsim players running sidearms, the boosted blowback creates a more immersive secondary weapon feel. Urban skirmish venues where pistols see heavy rotation also benefit from the added durability of hard-coated steel.

Technical Specifications

• Spring strength rating: 140% OEM
• Material: High-strength spring steel
• Surface finish: Hard-coat anti-corrosion
• Compatibility: Tokyo Marui G Series (G17, G18, G19, etc.)
• Installation: Requires disassembly of slide and hammer group

Compatibility & Upgrades

This hammer spring is a direct replacement for OEM TM Glock springs and pairs well with other CowCow performance internals such as reinforced hammers, sears, and nozzles. Upgrading the entire TM Glock trigger group in stages allows progressive tuning of trigger response and blowback.

UK Legal & Site Notes

This is an internal performance component and carries no legal restrictions in the UK. Most UK airsoft sites permit upgraded internals on pistols provided the overall weapon remains within site FPS limits. Always confirm your site’s chrono and upgrade policy before attending.

Installation & Fitting

Important: This spring requires intermediate-level airsoft gunsmith knowledge to install correctly. Incorrect fitting may damage the hammer assembly or cause unreliable feeding. We recommend having a qualified airsoft technician or gunsmith perform the installation to ensure proper seating, alignment, and function. The condition and wear of your TM Glock’s existing internals may require additional fitting work.

Upgrade your TM Glock’s blowback performance with this premium CowCow hammer spring. Order now from Airsoftdirect UK and arrange fitting with your preferred gunsmith.