New video from Airsoft Taiwan that pits the GHK G5 Gas Blowback SMG in its out of the box configuration versus the Custom G5 GBB Made by RA-Tech. A change in the test this time as they try to hit two birds with one stone, as the test shows the velocity and recoil kick of the two GBBs. Check the video out if you like what RA-Tech did to the much anticipated GBB from GHK.