Replace your plastic outer barrel with a metal one. Get the: Feature: Heat dissipation texture Design Design for for Kublai for M4 AEG BD556 Gel Blaster. Fit for Kublai K1,JingJi,JiQu,FB3.0 gel ball blaster V2 gearbox T Head Can build-in Water Gel Ball Blaster 14mm Hopup. Fit for Gel Blaster. Fit for AR Receiver .
