Efficiency Hammer Spring 75% for VFC AR / MCX GBBR Waldo Dynamics® (WD-VFC-WHS)

BRAND WALDO DYNAMICS®

The Efficiency Hammer Spring 75% by Waldo Dynamics® is designed to improve gas efficiency and operational smoothness for VFC AR and MCX GBBR platforms.

Featuring a 75% strength rating, this hammer spring delivers improved gas efficiency compared to the stock component while still maintaining reliable year-round usability, including during warmer seasons.

Despite the lighter tension compared to the stock spring, extensive testing across different climates confirmed reliable operation even with standard green gas during summer use.

This upgrade provides a simple yet effective way to improve overall rifle behaviour without sacrificing reliability or functionality.

The special blue anti-friction coating improves smooth operation while making the spring easy to identify during maintenance and technical work.

Main features

• Efficiency hammer spring for VFC GBBR platforms
• 75% strength rating
• Improves gas efficiency
• Designed for year-round use
• Compatible with green gas during summer
• Blue anti-friction coating
• Improves operational smoothness
• Simple and effective upgrade

Compatibility

• All VFC AR-based GBBR platforms
• VFC KS1 GBBR
• VFC BCM GBBR
• VFC URGI GBBR
• VFC XM Series GBBR
• VFC 416 GBBR
• APFG MCX GBBR

Main advantages

• Improved gas efficiency
• Smoother cycling behaviour
• Reliable performance across seasons
• Reduced mechanical stress
• Relatively easy installation

Installation: installation requires basic/intermediate technical knowledge. Following a dedicated video guide is recommended.