This reinforced Spring Guide replace the original Stock Spring Guide of Airsoft AEG This spring guide with Ball Bearing is designed to minimize the load for the motor caused by the spring tension Especially important for upgraded AEG to install this It also makes spring effectively spring back Backstop is specially equipped with Ball Bearing to prevent Spring Tension build-up during Full Auto Shooting Mode. It greatly reduces the risk of spring breakage Suitable for Airsoft Model of Tokyo Marui, Classic Army, ICS, G&P, G&G....etc as long as you have the correct gearbox version FOR GEAR BOX VER.2
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