VFC 8mm Enhanced Gearbox Assembly Ver.2 (for MK16 Buttstock Swith) ARES airsoft guns The ZConTAC IV has a

The ZConTAC IV has a flip-up panel to reveal the batteries on the left side where as the ZConTAC IV has an individual compartment for each battery on each side

RG108 also has the quick detach function

Gearbox in metal

user-friendly lower receiver

Designed As A Low-Cost

VFC 8mm Enhanced Gearbox Assembly Ver.2 (for MK16 Buttstock Swith) ARES airsoft guns The ZConTAC IV has aVFC 8mm Enhanced Gearbox Assembly Ver. 2 (for MK16 Buttstock Swith) compatible with standard series parts making maintenance upkeep, repairs and modifications as simple as any other version 2 gearbox Suitable for the MK16 by Cybergun VFC AEG Rifle