SHS Steel Spring Guide for Tokyo Marui M4 Next Generation

Features: This Steel Spring Guide for Tokyo Marui M4 Next Generation replace the original Stock Spring Guide Stainless Steel Construction This spring guide with Ball Bearing is designed to minimize the load for the motor caused by the spring tension It also makes spring effectively spring back Backstop is specially equipped with EIGHT Ball Bearing to prevent Spring Tension build-up during Full Auto Shooting Mode. It greatly reduces the risk of spring breakage Recommended to use inline with Upgrade Spring