Lonex Tune-Up M120SP Airsoft AEG Spring

The Lonex Tune-Up M120SP Airsoft AEG Spring is made of high-strength steel for maximum performance and durability. It features a non-linear spring design to displace pressure and deliver consistent shot velocities while helping to conserve battery power. The Tune-Up M120SP is a simple to install upgrade to increase your stock muzzle velocity to ranges within 350-400 FPS with .20g BBs. This spring is compatible with most AEG gearboxes, including Tokyo Marui, Matrix, and more.