7.4V 600mAh 30C LiPo for HPA Engines (JST) adapter Depending on your particular hop-up

Depending on your particular hop-up chamber

CNC Aluminium Hopup Arm For TM AKM/AKX GBBR

When the trigger pushes on the rod

It is incredibly expensive to machine a grip from 1 block of aluminium

7.4V 600mAh 30C LiPo for HPA Engines (JST) adapter Depending on your particular hop-upHigh discharge battery for HPA engines. This little but powerful LiPo battery has twice the capacity of usual HPA batteries, and with new high discharge materials. This ensures a significantly higher total shot capacity, especially with engines that rely on higher amperage to function, or in cold weather. The battery measures 80mm x 16mm x 10mm and can easily fit in grips, stocks or other small places. The battery comes with JST plug for engine