Waldo Dynamics VFC AR/MCX Winter Hammer Spring

The One Spring You Need For Efficiency All Year-Round. Boost your VFC GBBRs performance year-round with the Waldo Dynamics Winter Hammer Spring, precision-engineered for the VFC AR and MCX GBBR platforms. Designed at 75% strength, this hammer spring delivers improved gas efficiency over the stock component but can still be used all year around. That’s right, despite this being an overall weaker hammer spring you can still use this in peak summer on your usual green gasses. Waldo Dynamics performed some extensive testing in the last few months in climates all over the world and found no issues with its capabilities. This is just a very simple upgrade over the stock spring that can be installed within 3 minutes. Finished in a distinctive blue coating, the finish not only reduces friction (giving you a butter smooth shooting experience) but it also helps you tell it apart from other springs you may have.