SHS Steel Ball Bearing Spring Guide for Ver.3 Gearbox

FEATURES: SHS steel ball bearing spring guide. 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 9 ball bearing to prevent spring tension build-up during full auto. It greatly reduces the risk of spring breakage. Suitable for AEG gearbox Ver.3.