The T-N.T. GHK G5 GBBR high flow piston kit is an upgrade over the stock piston kit to increase the gas flow of your GHK G5 giving you higher FPS and higher felt recoil impulse.
The T-N.T. GHK G5 GBBR high flow piston kit is an upgrade over the stock piston kit to increase the gas flow of your GHK G5 giving you higher FPS and higher felt recoil impulse.