ITEM No:CM.098B Material:Metal Caliber:6mm Gearbox:New ETG Gearbox-V2(MIM 18:1 gears),Quick-Detach Spring,M1 Electronic Trigger Unit. Veloctity:393-426FPS/Others FPS that request Magazine Capacity:M183 600rds Battery Type:Ni-MH 1200mAh 9.6V