Are you looking for a power and gas efficient upgrade for your Tokyo Marui / WE GBB? Then this is something that you should definitely have! A Plus Airsoft's Techincal knockount System upgarde kit For Marui / WE Pistols increases the overall gas flow rate but will only release a certain amount each time making the fps relatively similar with each shot till the magazine runs out! In turn, it increases the muzzle velocity and improves the shooting experience!
However, if you wish to use this, we suggest you make sure your GBB has a metal slide as it'll most likely break a GBB with a plastic slide! It will also NOT work for the PX4 from TM and WE. You have been warned!
Redwolf tested this knockout system with marui hicapa 5.1, power increased around 15-20 feet per second.