This GPM MAK056 rear lower arm set is built for hobbyists who expect consistent rear end behaviour on the ARRMA KRATON 6S BLX. Fabricated from Aluminum 6061 T6, the arms provide a solid balance of stiffness and controlled flex. Delrin collar inserts are used at the pivot points to reduce slop and ensure repeatable alignment under load. The multi position mounting pattern allows measured changes to shock angle for setup tuning. Hollowed sections reduce rotating mass while retaining the required structural capacity, delivering a durable upgrade that integrates cleanly with stock knuckles.