Ultimate Power Spring 150 M/S

Airsoft players have always looked for new ways to improve performance replica guns. The launching of the ULTIMATE Upgrade Series by ASG offers enthusiasts the opportunity to access a range of high quality upgrade parts. All springs, with exception of the M100 spring (16669) are chromium plated which minimizes the friction on the piston. The ULTIMATE® springs are named M100, M110 etc. according to their expected tension in meters per second – measured when using a 0.20gr BB and a 300mm long barrel. In turn, a M110 spring would give 110 m/s.