The Guarder 6MM Reinforce Gearbox for Version 3 AEGs is the best way to upgrade your gearbox if you are shooting high fps, 450+. The steel is reinforced around the front of the cylinder and is designed to withstand the beating from a high powered spring. If you like your high powered gun performing in tip top condition you need this reinforced gearbox.
Material: Reinforced Steel
Design: Version 3 AEG