The Lancer Tactical Airsoft Irregular-Pitch Upgrade Spring M100 is a lower-powered AEG spring that will help you achieve an FPS of 320-390 depending on your supporting parts.
Features:
- Non-Liner Design
- Less Stress
- High-Quality Stainless Steel
- Anodized Piano Wire
- 140% Increased Spring Power (estimate based on average power output)