AMP M160 irregular Pitch Airsoft AEG Upgrade Spring

Specifications

• FPS Output: 500~560 FPS
• Manufacture: AMP / Spartan (USA) Classic Army / VFC (OEM)
• Compatibility: Designed for all versions of Airsoft AEG gearboxes

Features

• For experienced players only. Using high powered springs will result higher wear and tear than normal.
• Variable tension. Reduces stress, wear and tear for your gearbox
• Strength: Made out of stainless steel. Increased tension and durability.
• Tension lasts 50% longer than other leading brands