To build a tight & durable gearbox
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
Recommended to use Upgrade Spring along with the spring guide

FOR M14 GEAR BOX VER.7