Matrix M120 190% Irregular Pitch AEG Upgrade Spring (360-450FPS) Airsoft Parts The adjustment features also allow

The adjustment features also allow for seamless shoulder transition

6061-T6 Aluminum handle with aluminum barrel spacers

EP dot pattern texture for better grip

18 round BB capacity

Matrix M120 190% Irregular Pitch AEG Upgrade Spring (360-450FPS) Airsoft Parts The adjustment features also allowThese Matrix springs are build after careful study of major Japanese spring sets providing all the features you'll look for in an AEG spring for maximum performance. It is made out of high quality anodized piano wire, with tension carefully measured. Systema's irregular pitch, Prometheus's Stainless steel material and PDI's durability are all features duplicated and found in a Matrix spring. Test shown that this spring will last you longer, is more