Choose product variant that is currently not in stock. Once it is available, you will be automatically notified by e-mail.
Even if gearbox is builded and tested by us, for instalation you need skilled technican or experience
GREEN EDITION
Gearbox is builded for 350 fps/1.2j
Every gearbox is builded and tested by Retro ARMS.
Tested on DELTA ARMORY R15 FREYA, RA HOP UP CHAMBER and Warhead 31k motor
Results depends on many factors