Maple Leaf - Glock Hop Up Chamber and Inner Barrel Set (97mm) GunsModify 4403 Tool Steel

4403 Tool Steel

Made from high electrial spring steel

improve reliability and suppress bolt bounce by using two springs for recoil verses the traditional single spring

Also TM (Tokyo Marui) compatible

Maple Leaf - Glock Hop Up Chamber and Inner Barrel Set (97mm) GunsModify 4403 Tool SteelThis is a drop in kit that is pre assembled, so it is super easy to fit. Literally, all you need to do is place it inside your WE TM branded Glock's to instantly improve your pistol's consistency and range. The included hop rubber is a 60 rubber which is suitable for BB rounds in the 0. 2g 0. 28g range (which is usually the standard for a pistol). The barrel has a tight bore inner diameter of 6. 01mm, which will improve consistency and longer range