Airsoft Evolution Hammer Spring For VFC AR / M4 GBBR Series ( 80% / 100% / 130% )

Fine-tune your gas blowback rifle's performance and trigger response with the Airsoft Evolution Hammer Spring. Precision-coiled from high-strength steel, this upgrade part is designed to replace the factory hammer spring in VFC AR and M4 GBBR platforms.

Whether you are looking to improve gas efficiency in warm weather, replace a worn-out factory spring, or fix "light strike" issues when using high-pressure gas, Airsoft Evolution offers three distinct tension options to suit your exact build requirements:

Tension Options:

• 80% (Lightweight): Ideal for warm weather and standard green gas. Reduces the force required to cock the hammer, resulting in a smoother action, less wear on internal parts, and improved overall gas efficiency.
• 100% (Standard): A direct OEM-spec replacement. Perfect for restoring your rifle's factory performance and reliability if your original spring has weakened over time.
• 130% (Enhanced/Heavy): Designed for high-pressure gas (such as Red/Black gas). It delivers a harder hammer strike to the valve knocker, effectively eliminating "light strikes" and ensuring consistent gas release under high pressure.

• High-Quality Steel Construction
• Customizable Performance: Choose the exact spring tension to match your climate, gas type, and play style.
• Improved Reliability: Ensures crisp hammer drops and consistent valve strikes.

• Part Type: Hammer Spring
• Tension Options: 80% / 100% / 130%
• Material: High-Strength Steel
• Compatibility: VFC AR / M4 GBBR Series (Fire Control Group)